Inaccurate return type of \Drupal\views\Views::getView()

Problem/Motivation

Original code:

 /**
   * Loads a view from configuration and returns its executable object.
   *
   * @param string $id
   *   The view ID to load.
   *
   * @return \Drupal\views\ViewExecutable
   *   A view executable instance, from the loaded entity.
   */
  public static function getView($id) {
    $view = \Drupal::entityTypeManager()->getStorage('view')->load($id);
    if ($view) {
      return static::executableFactory()->get($view);
    }
  }

Proposed resolution

 /**
   * Loads a view from configuration and returns its executable object.
   *
   * @param string $id
   *   The view ID to load.
   *
   * @return \Drupal\views\ViewExecutable|null
   *   A view executable instance, from the loaded entity.
   */
  public static function getView($id) {
    $view = \Drupal::entityTypeManager()->getStorage('view')->load($id);
    if ($view) {
      return static::executableFactory()->get($view);
    }
    return NULL;
  }

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet