def METHOD_NAME(self, group_id, file_ref):
    """
    :param group_id:
    :type group_id str
    :param file_ref:
    :type file_ref str
    :return:
    """
    self._logger.info("Remove %s from group %s" % (self.get_MT_obj(file_ref).station, group_id))
    if group_id in self._group_dict:
        try:
            self._group_dict[group_id].remove(file_ref)
            self._file_to_groups[file_ref].remove(group_id)
            if not self._file_to_groups[file_ref]:
                self.add_to_group(DEFAULT_GROUP, file_ref)
            return True
        except KeyError:
            return False
    return False