Update code documentation

src/Plugin/views/field/BoxPlotField.php

@@ -118,7 +118,7 @@ class BoxPlotField extends FieldPluginBase implements ContainerFactoryPluginInte
    * @param string $part
    *   The box plot value key (min, first_quartile, etc.).
    *
-   * @return mixed
+   * @return float|NULL
    *   The field value.
    *
    * @throws \Exception
@@ -153,10 +153,7 @@ class BoxPlotField extends FieldPluginBase implements ContainerFactoryPluginInte
   }
 
   /**
-   * Set the data type for the chart field to be an array.
-   *
-   * @return string
-   *   The data type.
+   * {@inheritdoc}
    */
   public function getChartFieldDataType(): string {
     return 'array';

src/Plugin/views/field/CandlestickField.php

@@ -67,9 +67,15 @@ class CandlestickField extends FieldPluginBase implements ContainerFactoryPlugin
     );
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function query() {
   }
 
+  /**
+   * {@inheritdoc}
+   */
   protected function defineOptions() {
     $options = parent::defineOptions();
     $this->field_alias = 'candlestick_field';
@@ -81,6 +87,9 @@ class CandlestickField extends FieldPluginBase implements ContainerFactoryPlugin
     return $options;
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function buildOptionsForm(&$form, FormStateInterface $form_state) {
     parent::buildOptionsForm($form, $form_state);
     $fieldList = $this->displayHandler->getFieldLabels();
@@ -99,7 +108,20 @@ class CandlestickField extends FieldPluginBase implements ContainerFactoryPlugin
     return $form;
   }
 
-  protected function getCandlestickFieldValue(ResultRow $values, $part) {
+  /**
+   * Get the value of a candlestick field.
+   *
+   * @param \Drupal\views\ResultRow $values
+   *   Row results.
+   * @param string $part
+   *   The box plot value key (min, first_quartile, etc.).
+   *
+   * @return float|NULL
+   *   The field value.
+   *
+   * @throws \Exception
+   */
+  protected function getCandlestickFieldValue(ResultRow $values, string $part) {
     $field = $this->options[$part];
 
     if (isset($this->view->field[$field])) {
@@ -122,6 +144,9 @@ class CandlestickField extends FieldPluginBase implements ContainerFactoryPlugin
     return JSON::encode(array_values($candlestick_values));
   }
 
+  /**
+   * {@inheritdoc}
+   */
   public function getChartFieldDataType(): string {
     return 'array';
   }