class AuthorizationGrantFileDAOImpl implements AuthorizationGrantDAO {

   @Override
   public void removeGrant(UUID entityId, UUID placeId) {
      Map<UUID, AuthorizationGrant> placeGrants = grants.get(entityId);
      if(placeGrants != null) {
         placeGrants.remove(placeId);
      }
   }

   public  AuthorizationGrantFileDAOImpl();

}