tt_content.menu_abstract {

  settings.previewImageCropVariant = {$navigation.menu.abstract.previewImageCropVariant}

  dataProcessing {
    10 {
      dataProcessing {
        10 {
          references.fieldName = preview_image
          as = previewImages
        }
      }
    }

    70 = files
    70 {
      as = previewImagePlaceholder
      references.table = pages
      references.data = levelfield: -1, preview_image_placeholder, slide
    }

  }
}