getDisplayTab example

      ];

      // Add a text that the display is disabled.       if ($view->getExecutable()->displayHandlers->has($display_id)) {
        if (!$view->getExecutable()->displayHandlers->get($display_id)->isEnabled()) {
          $form['displays']['settings']['disabled']['#markup'] = $this->t('This display is disabled.');
        }
      }

      // Add the edit display content       $tab_content = $this->getDisplayTab($view);
      $tab_content['#theme_wrappers'] = ['container'];
      $tab_content['#attributes'] = ['class' => ['views-display-tab']];
      $tab_content['#id'] = 'views-tab-' . $display_id;
      // Mark deleted displays as such.       $display = $view->get('display');
      if (!empty($display[$display_id]['deleted'])) {
        $tab_content['#attributes']['class'][] = 'views-display-deleted';
      }
      // Mark disabled displays as such.
      if ($view->getExecutable()->displayHandlers->has($display_id) && !$view->getExecutable()->displayHandlers->get($display_id)->isEnabled()) {