function claro_preprocess_media_library_item__small
Implements hook_preprocess_media_library_item__small().
This targets each pre-selected media item selected when adding new media in the modal media library dialog.
File
- 
              core/
themes/ claro/ claro.theme, line 1429  
Code
function claro_preprocess_media_library_item__small(array &$variables) {
  $variables['content']['select']['#attributes']['class'][] = 'media-library-item__click-to-select-checkbox';
}
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