alterDisplayOptions example

'langcode' => \Drupal::languageManager()->getDefaultLanguage()->getId(),
    ];

    $view = View::create($values);

    // Build all display options for this view.     $display_options = $this->buildDisplayOptions($form, $form_state);

    // Allow the fully built options to be altered. This happens before adding     // the options to the view, so that once they are eventually added we will     // be able to get all the overrides correct.     $this->alterDisplayOptions($display_options, $form, $form_state);

    $this->addDisplays($view, $display_options, $form, $form_state);

    return new ViewUI($view);
  }

  /** * Builds an array of display options for the view. * * @return array * An array whose keys are the names of each display and whose values are * arrays of options for that display. */