Issue #3291789 by Nelo_Drup, apaderno, EPAM Systems: Notice: Undefined index:...

    foreach (array_keys($view_modes) as $view_mode) {

      $storage = $this->entityTypeManager->getStorage('entity_view_display');

      $view_display = $storage->load($entity_type . '.' . $bundle . '.' . $view_mode);

      $image_component = $view_display->getComponent($image_field_name);

      // A view display like a "Teaser" may not have the image field. In this

      // case the "$image_component" will be NULL. So, we should check it out.

      if ($image_component) {

        $media_component = $view_display->getComponent($media_field_name);

        $media_component['weight'] = $image_component['weight'];

        $view_display->setComponent($media_field_name, $media_component)->save();

      }

    }

    // ---------- Set for Form displays ------------------------.

    $form_modes = $this->entityDisplayRepository->getFormModeOptionsByBundle($entity_type, $bundle);