code: function onDroppableReturnedDefaultAnnouncement({dragEvent, dropzone}) {
    const sourceText = dragEvent.source.textContent.trim() || dragEvent.source.id || 'draggable element';
    const dropzoneText = dropzone.textContent.trim() || dropzone.id || 'droppable element';
  
    return `Returned ${sourceText} from ${dropzoneText}`;
  }
docs: Returns an announcement message when the Draggable element has returned to its original dropzone element
  @param {DroppableReturnedEvent} droppableEvent
  @return {String}