fix inline docs and typehinting

fieldblock.module

@@ -20,7 +20,7 @@ function fieldblock_form_field_ui_display_overview_form_alter(&$form, FormStateI
   $bundle = $form['#bundle'];
   $mode = $form['#mode'];
 
-  /** @var \Drupal\Core\Entity\EntityDisplayModeInterface $entity_view_display */
+  /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $entity_view_display */
   $entity_view_display = EntityViewDisplay::load($entity_type . '.' . $bundle . '.' . $mode);
 
   // Add a column header.
@@ -55,7 +55,7 @@ function fieldblock_field_display_submit($form, FormStateInterface $form_state)
   $bundle = $form['#bundle'];
   $mode = $form['#mode'];
 
-  /** @var \Drupal\Core\Entity\EntityDisplayModeInterface $view_mode_config */
+  /** @var \Drupal\Core\Entity\Display\EntityViewDisplayInterface $view_mode_config */
   $view_mode_config = EntityViewDisplay::load($entity_type . '.' . $bundle . '.' . $mode);
 
   $fields = $form_state->getValue('fields');
@@ -82,6 +82,14 @@ function fieldblock_field_display_submit($form, FormStateInterface $form_state)
  * context. The #post_render_cache callback makes this data available to the
  * fieldblock when it is built, We also hide the field from the render array.
  *
+ * @param array &$build
+ *   A renderable array representing the entity content.
+ * @param \Drupal\Core\Entity\EntityInterface $entity
+ *   The entity object being rendered. Not used in this implementation.
+ * @param \Drupal\Core\Entity\Display\EntityViewDisplayInterface $display
+ *   The entity view display holding the display options configured for the
+ *   entity components.
+ *
  * @see \Drupal\fieldblock\Plugin\Block\FieldBlock::fieldBlockPostRenderCache
  * @see https://www.drupal.org/node/2151609
  */