Issue #3271422 by Anybody: Manage display broken wiht error when used in combination with

      ],

    ];

    if ($this->moduleHandler->moduleExists('token')) {

      // Get the field target type, e.g. 'file':

      $target_type = $this->fieldDefinition->getSetting('target_type');

      $entity_type = $this->fieldDefinition->get('entity_type');

      // Get the field parent entity type, e.g. 'node':

      $entity_type = $this->fieldDefinition->getTargetEntityTypeId();

      $element['photoswipe_token_caption'] = [

        '#type' => 'fieldset',

        '#title' => $this->t('Replacement patterns'),