diff --git a/src/Plugin/Field/FieldWidget/ParagraphsWidget.php b/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
index c40afea6667c7080231348ccfaaa0648a8dfa534..3f91ace2aa4be86cae077b865ef8308deb03df43 100644
--- a/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
+++ b/src/Plugin/Field/FieldWidget/ParagraphsWidget.php
@@ -130,7 +130,7 @@ class ParagraphsWidget extends WidgetBase {
    */
   public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, EntityFieldManagerInterface $entity_field_manager) {
     // Modify settings that were set before https://www.drupal.org/node/2896115.
-    if(isset($settings['edit_mode']) && $settings['edit_mode'] === 'preview') {
+      if (isset($settings['edit_mode']) && $settings['edit_mode'] === 'preview') {
       $settings['edit_mode'] = 'closed';
       $settings['closed_mode'] = 'preview';
     }
@@ -158,7 +158,7 @@ class ParagraphsWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public static function defaultSettings() {
-    return array(
+    return [
       'title' => t('Paragraph'),
       'title_plural' => t('Paragraphs'),
       'edit_mode' => 'open',
@@ -168,40 +168,43 @@ class ParagraphsWidget extends WidgetBase {
       'add_mode' => 'dropdown',
       'form_display_mode' => 'default',
       'default_paragraph_type' => '',
-      'features' => ['duplicate' => 'duplicate', 'collapse_edit_all' => 'collapse_edit_all'],
-    );
+      'features' => [
+        'duplicate' => 'duplicate',
+        'collapse_edit_all' => 'collapse_edit_all',
+      ],
+    ];
   }
 
   /**
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    $elements = array();
+    $elements = [];
 
-    $elements['title'] = array(
+    $elements['title'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Paragraph Title'),
       '#description' => $this->t('Label to appear as title on the button as "Add new [title]", this label is translatable'),
       '#default_value' => $this->getSetting('title'),
       '#required' => TRUE,
-    );
+    ];
 
-    $elements['title_plural'] = array(
+    $elements['title_plural'] = [
       '#type' => 'textfield',
       '#title' => $this->t('Plural Paragraph Title'),
       '#description' => $this->t('Title in its plural form.'),
       '#default_value' => $this->getSetting('title_plural'),
       '#required' => TRUE,
-    );
+    ];
 
-    $elements['edit_mode'] = array(
+    $elements['edit_mode'] = [
       '#type' => 'select',
       '#title' => $this->t('Edit mode'),
       '#description' => $this->t('The mode the paragraph is in by default.'),
       '#options' => $this->getSettingOptions('edit_mode'),
       '#default_value' => $this->getSetting('edit_mode'),
       '#required' => TRUE,
-    );
+    ];
 
     $elements['closed_mode'] = [
       '#type' => 'select',
@@ -221,7 +224,7 @@ class ParagraphsWidget extends WidgetBase {
       '#required' => TRUE,
       '#states' => [
         'visible' => [
-          'select[name="fields[' . $this->fieldDefinition->getName() .  '][settings_edit_form][settings][edit_mode]"]' => ['value' => 'closed'],
+          'select[name="fields[' . $this->fieldDefinition->getName() . '][settings_edit_form][settings][edit_mode]"]' => ['value' => 'closed'],
         ],
       ],
     ];
@@ -234,30 +237,30 @@ class ParagraphsWidget extends WidgetBase {
       '#min' => 0,
       '#states' => [
         'invisible' => [
-          'select[name="fields[' . $this->fieldDefinition->getName() .  '][settings_edit_form][settings][edit_mode]"]' => ['value' => 'open'],
+          'select[name="fields[' . $this->fieldDefinition->getName() . '][settings_edit_form][settings][edit_mode]"]' => ['value' => 'open'],
         ],
       ],
     ];
 
-    $elements['add_mode'] = array(
+    $elements['add_mode'] = [
       '#type' => 'select',
       '#title' => $this->t('Add mode'),
       '#description' => $this->t('The way to add new Paragraphs.'),
       '#options' => $this->getSettingOptions('add_mode'),
       '#default_value' => $this->getSetting('add_mode'),
       '#required' => TRUE,
-    );
+    ];
 
-    $elements['form_display_mode'] = array(
+    $elements['form_display_mode'] = [
       '#type' => 'select',
       '#options' => \Drupal::service('entity_display.repository')->getFormModeOptions($this->getFieldSetting('target_type')),
       '#description' => $this->t('The form display mode to use when rendering the paragraph form.'),
       '#title' => $this->t('Form display mode'),
       '#default_value' => $this->getSetting('form_display_mode'),
       '#required' => TRUE,
-    );
+    ];
 
-    $options  = [];
+    $options = [];
     foreach ($this->getAllowedTypes() as $key => $bundle) {
       $options[$key] = $bundle['label'];
     }
@@ -295,13 +298,13 @@ class ParagraphsWidget extends WidgetBase {
    *   - "edit_mode"
    *   - "closed_mode"
    *   - "autocollapse"
-   *   - "add_mode"
+   *   - "add_mode".
    *
    * @return array|null
    *   An array of setting option usable as a value for a "#options" key.
    */
   protected function getSettingOptions($setting_name) {
-    switch($setting_name) {
+    switch ($setting_name) {
       case 'edit_mode':
         $options = [
           'open' => $this->t('Open'),
@@ -309,18 +312,21 @@ class ParagraphsWidget extends WidgetBase {
           'closed_expand_nested' => $this->t('Closed, show nested'),
         ];
         break;
+
       case 'closed_mode':
         $options = [
           'summary' => $this->t('Summary'),
           'preview' => $this->t('Preview'),
         ];
         break;
+
       case 'autocollapse':
         $options = [
           'none' => $this->t('None'),
           'all' => $this->t('All'),
         ];
         break;
+
       case 'add_mode':
         $options = [
           'select' => $this->t('Select list'),
@@ -329,6 +335,7 @@ class ParagraphsWidget extends WidgetBase {
           'modal' => $this->t('Modal form'),
         ];
         break;
+        
       case 'features':
         $options = [
           'duplicate' => $this->t('Duplicate'),
@@ -349,10 +356,10 @@ class ParagraphsWidget extends WidgetBase {
    * {@inheritdoc}
    */
   public function settingsSummary() {
-    $summary = array();
+    $summary = [];
     $summary[] = $this->t('Title: @title', ['@title' => $this->getSetting('title')]);
     $summary[] = $this->t('Plural title: @title_plural', [
-      '@title_plural' => $this->getSetting('title_plural')
+      '@title_plural' => $this->getSetting('title_plural'),
     ]);
 
     $edit_mode = $this->getSettingOptions('edit_mode')[$this->getSetting('edit_mode')];
@@ -371,11 +378,11 @@ class ParagraphsWidget extends WidgetBase {
     $summary[] = $this->t('Add mode: @add_mode', ['@add_mode' => $add_mode]);
 
     $summary[] = $this->t('Form display mode: @form_display_mode', [
-      '@form_display_mode' => $this->getSetting('form_display_mode')
+      '@form_display_mode' => $this->getSetting('form_display_mode'),
     ]);
     if ($this->getDefaultParagraphTypeLabelName() !== NULL) {
       $summary[] = $this->t('Default paragraph type: @default_paragraph_type', [
-        '@default_paragraph_type' => $this->getDefaultParagraphTypeLabelName()
+        '@default_paragraph_type' => $this->getDefaultParagraphTypeLabelName(),
       ]);
     }
     $features_labels = array_intersect_key($this->getSettingOptions('features'), array_filter($this->getSetting('features')));
@@ -446,9 +453,9 @@ class ParagraphsWidget extends WidgetBase {
       $entity_type = $entity_type_manager->getDefinition($target_type);
       $bundle_key = $entity_type->getKey('bundle');
 
-      $paragraphs_entity = $entity_type_manager->getStorage($target_type)->create(array(
+      $paragraphs_entity = $entity_type_manager->getStorage($target_type)->create([
         $bundle_key => $widget_state['selected_bundle'],
-      ));
+      ]);
       $paragraphs_entity->setParentEntity($host, $field_name);
 
       $item_mode = 'edit';
@@ -543,18 +550,18 @@ class ParagraphsWidget extends WidgetBase {
       $element_parents[] = $delta;
       $element_parents[] = 'subform';
 
-      $id_prefix = implode('-', array_merge($parents, array($field_name, $delta)));
+      $id_prefix = implode('-', array_merge($parents, [$field_name, $delta]));
       $wrapper_id = Html::getUniqueId($id_prefix . '-item-wrapper');
 
-      $element += array(
+      $element += [
         '#type' => 'container',
-        '#element_validate' => array(array($this, 'elementValidate')),
+        '#element_validate' => [[$this, 'elementValidate']],
         '#paragraph_type' => $paragraphs_entity->bundle(),
-        'subform' => array(
+        'subform' => [
           '#type' => 'container',
           '#parents' => $element_parents,
-        ),
-      );
+        ],
+      ];
 
       $element['#prefix'] = '<div id="' . $wrapper_id . '">';
       $element['#suffix'] = '</div>';
@@ -632,7 +639,9 @@ class ParagraphsWidget extends WidgetBase {
           '#name' => $id_prefix . '_duplicate',
           '#weight' => 502,
           '#submit' => [[get_class($this), 'duplicateSubmit']],
-          '#limit_validation_errors' => [array_merge($parents, [$field_name, $delta])],
+          '#limit_validation_errors' => [
+            array_merge($parents, [$field_name, $delta])
+          ],
           '#delta' => $delta,
           '#ajax' => [
             'callback' => [get_class($this), 'itemAjax'],
@@ -683,7 +692,7 @@ class ParagraphsWidget extends WidgetBase {
             '#limit_validation_errors' => [],
             '#delta' => $delta,
             '#ajax' => [
-              'callback' => array(get_class($this), 'itemAjax'),
+              'callback' => [get_class($this), 'itemAjax'],
               'wrapper' => $widget_state['ajax_wrapper_id'],
             ],
             '#access' => $this->removeButtonAccess($paragraphs_entity),
@@ -701,7 +710,9 @@ class ParagraphsWidget extends WidgetBase {
               '#name' => $id_prefix . '_collapse',
               '#weight' => 1,
               '#submit' => [[get_class($this), 'paragraphsItemSubmit']],
-              '#limit_validation_errors' => [array_merge($parents, [$field_name, $delta])],
+              '#limit_validation_errors' => [
+                array_merge($parents, [$field_name, $delta])
+              ],
               '#delta' => $delta,
               '#ajax' => [
                 'callback' => [get_class($this), 'itemAjax'],
@@ -711,7 +722,11 @@ class ParagraphsWidget extends WidgetBase {
               '#paragraphs_mode' => 'closed',
               '#paragraphs_show_warning' => TRUE,
               '#attributes' => [
-                'class' => ['paragraphs-icon-button', 'paragraphs-icon-button-collapse', 'button--extrasmall'],
+                'class' => [
+                  'paragraphs-icon-button', 
+                  'paragraphs-icon-button-collapse', 
+                  'button--extrasmall'
+                ],
                 'title' => $this->t('Collapse'),
               ],
             ];
@@ -736,7 +751,11 @@ class ParagraphsWidget extends WidgetBase {
               '#access' => $paragraphs_entity->access('update') && !$translating_force_close,
               '#paragraphs_mode' => 'edit',
               '#attributes' => [
-                'class' => ['paragraphs-icon-button', 'paragraphs-icon-button-edit', 'button--extrasmall'],
+                'class' => [
+                  'paragraphs-icon-button', 
+                  'paragraphs-icon-button-edit', 
+                  'button--extrasmall'
+                ],
                 'title' => $this->t('Edit'),
               ],
             ]);
@@ -804,13 +823,19 @@ class ParagraphsWidget extends WidgetBase {
         if (!empty($widget_actions['actions'])) {
           // Expand all actions to proper submit elements and add it to top
           // actions sub component.
-          $element['top']['actions']['actions'] = array_map([$this, 'expandButton'], $widget_actions['actions']);
+          $element['top']['actions']['actions'] = array_map(
+            [$this, 'expandButton'], 
+            $widget_actions['actions']
+          );
         }
 
         if (!empty($widget_actions['dropdown_actions'])) {
           // Expand all dropdown actions to proper submit elements and add
           // them to top dropdown actions sub component.
-          $element['top']['actions']['dropdown_actions'] = array_map([$this, 'expandButton'], $widget_actions['dropdown_actions']);
+          $element['top']['actions']['dropdown_actions'] = array_map(
+            [$this, 'expandButton'], 
+            $widget_actions['dropdown_actions']
+          );
         }
       }
 
@@ -829,7 +854,10 @@ class ParagraphsWidget extends WidgetBase {
 
         field_group_attach_groups($element['subform'], $context);
         if (method_exists(FormatterHelper::class, 'formProcess')) {
-          $element['subform']['#process'][] = [FormatterHelper::class, 'formProcess'];
+          $element['subform']['#process'][] = [
+            FormatterHelper::class,
+            'formProcess'
+          ];
         }
         elseif (function_exists('field_group_form_pre_render')) {
           $element['subform']['#pre_render'][] = 'field_group_form_pre_render';
@@ -856,14 +884,15 @@ class ParagraphsWidget extends WidgetBase {
 
         foreach (Element::children($element['subform']) as $field) {
           if ($paragraphs_entity->hasField($field)) {
-            $field_definition = $paragraphs_entity->get($field)->getFieldDefinition();
+            $field_definition = $paragraphs_entity->get($field)
+              ->getFieldDefinition();
 
             // Do a check if we have to add a class to the form element. We need
-            // those classes (paragraphs-content and paragraphs-behavior) to show
-            // and hide elements, depending of the active perspective.
+            // those classes (paragraphs-content and paragraphs-behavior) to 
+            // show and hide elements, depending of the active perspective.
             // We need them to filter out entity reference revisions fields that
-            // reference paragraphs, cause otherwise we have problems with showing
-            // and hiding the right fields in nested paragraphs.
+            // reference paragraphs, cause otherwise we have problems
+            // with showing and hiding the right fields in nested paragraphs.
             $is_paragraph_field = FALSE;
             if ($field_definition->getType() == 'entity_reference_revisions') {
               // Check if we are referencing paragraphs.
@@ -891,7 +920,7 @@ class ParagraphsWidget extends WidgetBase {
               else {
                 $element['subform'][$field]['widget']['#after_build'][] = [
                   static::class,
-                  'addTranslatabilityClue'
+                  'addTranslatabilityClue',
                 ];
               }
             }
@@ -907,7 +936,10 @@ class ParagraphsWidget extends WidgetBase {
             $element['behavior_plugins'][$plugin_id] = [
               '#type' => 'container',
               '#group' => implode('][', array_merge($element_parents, ['paragraph_behavior'])),
-              '#parents' => array_merge(array_slice($element_parents, 0, -1), ['behavior_plugins', $plugin_id]),
+              '#parents' => array_merge(
+                array_slice($element_parents, 0, -1), 
+                ['behavior_plugins', $plugin_id]
+              ),
             ];
             $subform_state = SubformState::createForSubform($element['behavior_plugins'][$plugin_id], $form, $form_state);
             if ($plugin_form = $plugin->buildBehaviorForm($paragraphs_entity, $element['behavior_plugins'][$plugin_id], $subform_state)) {
@@ -1026,7 +1058,7 @@ class ParagraphsWidget extends WidgetBase {
         $element['behavior_plugins'] = [];
       }
       else {
-        $element['subform'] = array();
+        $element['subform'] = [];
       }
 
       // If we have any info items lets add them to the top section.
@@ -1242,17 +1274,18 @@ class ParagraphsWidget extends WidgetBase {
    * Returns the sorted allowed types for a entity reference field.
    *
    * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
-   *  (optional) The field definition forwhich the allowed types should be
-   *  returned, defaults to the current field.
+   *   (optional) The field definition forwhich the allowed types should be
+   *   returned, defaults to the current field.
    *
    * @return array
-   *   A list of arrays keyed by the paragraph type machine name with the following properties.
+   *   A list of arrays keyed by the paragraph type machine name with the 
+   *   following properties.
    *     - label: The label of the paragraph type.
    *     - weight: The weight of the paragraph type.
    */
   public function getAllowedTypes(?FieldDefinitionInterface $field_definition = NULL) {
 
-    $return_bundles = array();
+    $return_bundles = [];
     /** @var \Drupal\Core\Entity\EntityReferenceSelection\SelectionPluginManagerInterface $selection_manager */
     $selection_manager = \Drupal::service('plugin.manager.entity_reference_selection');
     $handler = $selection_manager->getSelectionHandler($field_definition ?: $this->fieldDefinition);
@@ -1267,10 +1300,10 @@ class ParagraphsWidget extends WidgetBase {
         if (empty($this->getSelectionHandlerSetting('target_bundles'))
           || in_array($machine_name, $this->getSelectionHandlerSetting('target_bundles'))) {
 
-          $return_bundles[$machine_name] = array(
+          $return_bundles[$machine_name] = [
             'label' => $bundle['label'],
             'weight' => $weight,
-          );
+          ];
 
           $weight++;
         }
@@ -1312,7 +1345,7 @@ class ParagraphsWidget extends WidgetBase {
           'entity' => $paragraphs_entity,
           'display' => $display,
           'mode' => 'edit',
-          'original_delta' => 1
+          'original_delta' => 1,
         ];
         $max = 1;
         $field_state['items_count'] = $max;
@@ -1325,9 +1358,9 @@ class ParagraphsWidget extends WidgetBase {
     $field_title = $this->fieldDefinition->getLabel();
     $description = FieldFilteredMarkup::create(\Drupal::token()->replace($this->fieldDefinition->getDescription() ?? ''));
 
-    $elements = array();
+    $elements = [];
     $tabs = '';
-    $this->fieldIdPrefix = implode('-', array_merge($this->fieldParents, array($field_name)));
+    $this->fieldIdPrefix = implode('-', array_merge($this->fieldParents, [$field_name]));
     $this->fieldWrapperId = Html::getId($this->fieldIdPrefix . '-add-more-wrapper');
 
     // If the parent entity is paragraph add the nested class if not then add
@@ -1368,7 +1401,6 @@ class ParagraphsWidget extends WidgetBase {
       ]);
 
       $elements['#attached']['library'][] = 'paragraphs/paragraphs-dragdrop';
-      //$elements['dragdrop_mode']['#button_type'] = 'primary';
       $elements['dragdrop'] = $this->buildNestedParagraphsFoDragDrop($form_state, NULL, []);
       return $elements;
     }
@@ -1381,12 +1413,12 @@ class ParagraphsWidget extends WidgetBase {
           $items->appendItem();
         }
 
-        // For multiple fields, title and description are handled by the wrapping
-        // table.
-        $element = array(
+        /* For multiple fields, title and description are handled by the wrapping
+        table. */
+        $element = [
           '#title' => $is_multiple ? '' : $field_title,
           '#description' => $is_multiple ? '' : $description,
-        );
+        ];
         $element = $this->formSingleElement($items, $delta, $element, $form, $form_state);
 
         if ($element) {
@@ -1394,15 +1426,15 @@ class ParagraphsWidget extends WidgetBase {
           if ($is_multiple) {
             // We name the element '_weight' to avoid clashing with elements
             // defined by widget.
-            $element['_weight'] = array(
+            $element['_weight'] = [
               '#type' => 'weight',
-              '#title' => $this->t('Weight for row @number', array('@number' => $delta + 1)),
+              '#title' => $this->t('Weight for row @number', ['@number' => $delta + 1]),
               '#title_display' => 'invisible',
               // Note: this 'delta' is the FAPI #type 'weight' element's property.
               '#delta' => $max,
               '#default_value' => $items[$delta]->_weight ?: $delta,
               '#weight' => 100,
-            );
+            ];
           }
 
           // Access for the top element is set to FALSE only when the paragraph
@@ -1479,7 +1511,7 @@ class ParagraphsWidget extends WidgetBase {
         '#attributes' => [
           'class' => [
             'paragraph-type-add-delta',
-            $this->getSetting('add_mode')
+            $this->getSetting('add_mode'),
           ],
         ],
       ];
@@ -1640,13 +1672,13 @@ class ParagraphsWidget extends WidgetBase {
 
         // We name the element '_weight' to avoid clashing with elements
         // defined by widget.
-        $element['_weight'] = array(
+        $element['_weight'] = [
           '#type' => 'hidden',
           '#default_value' => $child_delta,
           '#attributes' => [
             'class' => ['paragraphs-dragdrop__weight'],
-          ]
-        );
+          ],
+        ];
 
         $element['_path'] = [
           '#type' => 'hidden',
@@ -1655,14 +1687,20 @@ class ParagraphsWidget extends WidgetBase {
           '#default_value' => $child_path,
           '#attributes' => [
             'class' => ['paragraphs-dragdrop__path'],
-          ]
+          ],
         ];
 
         $summary_options = [];
 
         $element['#prefix'] = '<li class="paragraphs-dragdrop__item" data-paragraphs-dragdrop-bundle="' . $child_paragraph->bundle() . '"><a href="#" class="paragraphs-dragdrop__handle"><span class="paragraphs-dragdrop__icon"></span></a>';
         $element['#suffix'] = '</li>';
-        $child_array_parents = array_merge($array_parents,  [$child_field_name, $child_delta]);
+        $child_array_parents = array_merge(
+          $array_parents,  
+          [
+            $child_field_name, 
+            $child_delta
+          ]
+        );
 
         if ($child_elements = $this->buildNestedParagraphsFoDragDrop($form_state, $child_paragraph, $child_array_parents)) {
           $element['dragdrop'] = $child_elements;
@@ -1694,7 +1732,7 @@ class ParagraphsWidget extends WidgetBase {
    * Add 'add more' button, if not working with a programmed form.
    *
    * @return array
-   *    The form element array.
+   *   The form element array.
    */
   protected function buildAddActions() {
     if (count($this->getAccessibleOptions()) === 0) {
@@ -1808,7 +1846,7 @@ class ParagraphsWidget extends WidgetBase {
    *
    * @param array $form
    *   Form array.
-   * @param FormStateInterface $form_state
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
    *   Form state object.
    * @param int $position
    *   Position of triggering element.
@@ -1896,7 +1934,14 @@ class ParagraphsWidget extends WidgetBase {
         '#name' => $this->fieldIdPrefix . '_' . $machine_name . '_add_more',
         '#value' => $add_mode == 'modal' ? $label : $this->t('Add @type', ['@type' => $label]),
         '#attributes' => ['class' => ['field-add-more-submit', 'button--small']],
-        '#limit_validation_errors' => [array_merge($this->fieldParents, [$this->fieldDefinition->getName(), 'add_more'])],
+        '#limit_validation_errors' => [
+          array_merge(
+            $this->fieldParents, [
+              $this->fieldDefinition->getName(), 
+              'add_more'
+            ]
+          )
+        ],
         '#submit' => [[get_class($this), 'addMoreSubmit']],
         '#ajax' => [
           'callback' => [get_class($this), 'addMoreAjax'],
@@ -1970,7 +2015,14 @@ class ParagraphsWidget extends WidgetBase {
       '#name' => strtr($this->fieldIdPrefix, '-', '_') . '_add_more',
       '#value' => $text,
       '#attributes' => ['class' => ['field-add-more-submit']],
-      '#limit_validation_errors' => [array_merge($this->fieldParents, [$field_name, 'add_more'])],
+      '#limit_validation_errors' => [
+        array_merge(
+          $this->fieldParents, [
+            $field_name, 
+            'add_more'
+          ]
+        )
+      ],
       '#submit' => [[get_class($this), 'addMoreSubmit']],
       '#ajax' => [
         'callback' => [get_class($this), 'addMoreAjax'],
@@ -1979,7 +2031,7 @@ class ParagraphsWidget extends WidgetBase {
       ],
     ];
 
-    $add_more_elements['add_more_button']['#suffix'] = $this->t(' to %type', ['%type' => $field_title]);
+    $add_more_elements['add_more_button']['#suffix'] = $this->t('to %type', ['%type' => $field_title]);
     return $add_more_elements;
   }
 
@@ -2204,6 +2256,9 @@ class ParagraphsWidget extends WidgetBase {
     $form_state->setRebuild();
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public static function paragraphsItemSubmit(array $form, FormStateInterface $form_state) {
     $submit = ParagraphsWidget::getSubmitElementInfo($form, $form_state, ParagraphsWidget::ACTION_POSITION_ACTIONS);
 
@@ -2259,6 +2314,9 @@ class ParagraphsWidget extends WidgetBase {
     return $submit['element'];
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public static function itemAjax(array $form, FormStateInterface $form_state) {
     $submit = ParagraphsWidget::getSubmitElementInfo($form, $form_state, ParagraphsWidget::ACTION_POSITION_ACTIONS);
 
@@ -2296,13 +2354,12 @@ class ParagraphsWidget extends WidgetBase {
     $form_state->setRebuild();
   }
 
-
   /**
    * Reorder paragraphs.
    *
    * @param \Drupal\Core\Form\FormStateInterface $form_state
    *   The form state.
-   * @param $field_values_parents
+   * @param mixed $field_values_parents
    *   The field value parents.
    */
   protected static function reorderParagraphs(FormStateInterface $form_state, $field_values_parents) {
@@ -2311,7 +2368,7 @@ class ParagraphsWidget extends WidgetBase {
     $complete_field_storage = NestedArray::getValue(
       $form_state->getStorage(), [
         'field_storage',
-        '#parents'
+        '#parents',
       ]
     );
     $new_field_storage = $complete_field_storage;
@@ -2357,7 +2414,7 @@ class ParagraphsWidget extends WidgetBase {
               '#fields',
               $field_name,
               'paragraphs',
-              $delta
+              $delta,
             ]
           );
           $path = explode('][', $item_values['_path']);
@@ -2374,7 +2431,7 @@ class ParagraphsWidget extends WidgetBase {
               '#fields',
               $new_field_name,
               'paragraphs',
-              $item_values['_weight']
+              $item_values['_weight'],
             ]
           );
           $key_exists = NULL;
@@ -2406,13 +2463,27 @@ class ParagraphsWidget extends WidgetBase {
             // it to an empty array in case all paragraphs have been moved away
             // from it.
             foreach (array_keys($item_values['dragdrop']) as $sub_field_name) {
-              $new_widget_state_keys = array_merge($parents, [$field_name, $item_values['_weight'] ,'subform', '#fields', $sub_field_name]);
+              $new_widget_state_keys = array_merge(
+                $parents, [
+                  $field_name, 
+                  $item_values['_weight'] ,
+                  'subform', '#fields', 
+                  $sub_field_name
+                ]
+              );
               if (!NestedArray::getValue($new_field_storage, $new_widget_state_keys)) {
                 NestedArray::setValue($new_field_storage, $new_widget_state_keys, ['paragraphs' => []]);
               }
             }
 
-            $reorder_paragraphs($item_values['dragdrop'], array_merge($parents, [$field_name, $delta, 'subform']), $item_state['entity']);
+            $reorder_paragraphs($item_values['dragdrop'], array_merge(
+              $parents, [
+                $field_name, 
+                $delta, 
+                'subform'
+              ]
+            ), 
+            $item_state['entity']);
           }
         }
       }
@@ -2575,7 +2646,6 @@ class ParagraphsWidget extends WidgetBase {
     return $element;
   }
 
-
   /**
    * Special handling to validate form elements with multiple values.
    *
@@ -2607,7 +2677,7 @@ class ParagraphsWidget extends WidgetBase {
     $element = NestedArray::getValue($form_state->getCompleteForm(), $widget_state['array_parents'] ?? []);
 
     if (!empty($widget_state['dragdrop'])) {
-      $path = array_merge($form['#parents'], array($field_name));
+      $path = array_merge($form['#parents'], [$field_name]);
       static::reorderParagraphs($form_state, $path);
 
       // After re-ordering, get the updated widget state.
@@ -2703,7 +2773,7 @@ class ParagraphsWidget extends WidgetBase {
         $item['target_revision_id'] = $paragraphs_entity->getRevisionId();
       }
       // If our mode is remove don't save or reference this entity.
-      // @todo: Maybe we should actually delete it here?
+      // @todo Maybe we should actually delete it here?
       elseif (isset($widget_state['paragraphs'][$item['_original_delta']]['mode']) && $widget_state['paragraphs'][$item['_original_delta']]['mode'] == 'remove') {
         $item['target_id'] = NULL;
         $item['target_revision_id'] = NULL;
@@ -2721,7 +2791,7 @@ class ParagraphsWidget extends WidgetBase {
 
     // Remove buttons from header actions.
     $field_name = $this->fieldDefinition->getName();
-    $path = array_merge($form['#parents'], array($field_name));
+    $path = array_merge($form['#parents'], [$field_name]);
     $form_state_variables = $form_state->getValues();
     $key_exists = NULL;
     $values = NestedArray::getValue($form_state_variables, $path, $key_exists);
@@ -2742,7 +2812,9 @@ class ParagraphsWidget extends WidgetBase {
    * Initializes $this->isTranslating.
    *
    * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   String.
    * @param \Drupal\Core\Entity\ContentEntityInterface $host
+   *   String.
    */
   protected function initIsTranslating(FormStateInterface $form_state, ContentEntityInterface $host) {
     if ($this->isTranslating != NULL) {
@@ -2760,7 +2832,8 @@ class ParagraphsWidget extends WidgetBase {
       return;
     }
 
-    // Supporting \Drupal\content_translation\Controller\ContentTranslationController.
+    // Supporting 
+    // \Drupal\content_translation\Controller\ContentTranslationController.
     if (!empty($form_state->get('content_translation'))) {
       // Adding a translation.
       $this->isTranslating = TRUE;
@@ -2779,9 +2852,12 @@ class ParagraphsWidget extends WidgetBase {
    * "(all languages)" suffix to the widget title, replicate that here.
    *
    * @param array $element
+   *   String.
    * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   String.
    *
    * @return array
+   *   The container form element
    */
   public static function addTranslatabilityClue(array $element, FormStateInterface $form_state) {
     static $suffix, $fapi_title_elements;
@@ -2792,7 +2868,23 @@ class ParagraphsWidget extends WidgetBase {
     // Elements which can have a #title attribute according to FAPI Reference.
     if (!isset($suffix)) {
       $suffix = ' <span class="translation-entity-all-languages">(' . t('all languages') . ')</span>';
-      $fapi_title_elements = array_flip(['checkbox', 'checkboxes', 'date', 'details', 'fieldset', 'file', 'item', 'password', 'password_confirm', 'radio', 'radios', 'select', 'textarea', 'textfield', 'weight']);
+      $fapi_title_elements = array_flip([
+        'checkbox', 
+        'checkboxes', 
+        'date', 
+        'details', 
+        'fieldset', 
+        'file', 
+        'item', 
+        'password', 
+        'password_confirm', 
+        'radio', 
+        'radios', 
+        'select', 
+        'textarea', 
+        'textfield', 
+        'weight'
+      ]);
     }
 
     // Update #title attribute for all elements that are allowed to have a
@@ -2932,7 +3024,7 @@ class ParagraphsWidget extends WidgetBase {
           '#limit_validation_errors' => [
             array_merge($this->fieldParents, [$field_name, 'dragdrop_mode']),
           ],
-          '#access' => $this->allowReferenceChanges()
+          '#access' => $this->allowReferenceChanges(),
         ]);
       }
     }
@@ -2976,7 +3068,11 @@ class ParagraphsWidget extends WidgetBase {
       // order and with the right settings.
       if ($mode === 'closed') {
         $edit_all['#attributes'] = [
-          'class' => ['paragraphs-icon-button', 'paragraphs-icon-button-edit', 'button--extrasmall'],
+          'class' => [
+            'paragraphs-icon-button', 
+            'paragraphs-icon-button-edit', 
+            'button--extrasmall'
+          ],
           'title' => $this->t('Edit all'),
         ];
         $edit_all['#title'] = $this->t('Edit All');
@@ -2985,7 +3081,11 @@ class ParagraphsWidget extends WidgetBase {
       }
       else {
         $collapse_all['#attributes'] = [
-          'class' => ['paragraphs-icon-button', 'paragraphs-icon-button-collapse', 'button--extrasmall'],
+          'class' => [
+            'paragraphs-icon-button', 
+            'paragraphs-icon-button-collapse', 
+            'button--extrasmall'
+          ],
           'title' => $this->t('Collapse all'),
         ];
         $actions['actions']['collapse_all'] = $collapse_all;
@@ -3199,7 +3299,10 @@ class ParagraphsWidget extends WidgetBase {
 
       $form_state->setError($element[$item['_original_delta']], $new_message);
     } else {
-      $form_state->setError($element[$item['_original_delta']], $this->t('Validation error on collapsed paragraph @path: @message', ['@path' => $violation->getPropertyPath(), '@message' => $violation->getMessage()]));
+      $form_state->setError($element[$item['_original_delta']], $this->t('Validation error on collapsed paragraph @path: @message', [
+        '@path' => $violation->getPropertyPath(), 
+        '@message' => $violation->getMessage()
+      ]));
     }
   }