type MdKitDocumentToolbarProps = {
  className?: string;
  collaboration?: MdKitCollaborationSession | null;
  document: MdKitDocumentController;
  onOpenConflict?: () => Promise<void> | void;
  onOpenVersionHistory?: () => Promise<void> | void;
  showConflictActions?: boolean;
  versions?:   | MdKitDocumentVersionsController
     | null;
};