def METHOD_NAME(self) -> List[int]:
    all_group_index_to_group_name_mapping: Dict[
        int, str
    ] = self.get_all_group_index_to_group_name_mapping()
    all_group_indexes: List[int] = list(
        all_group_index_to_group_name_mapping.keys()
    )
    return all_group_indexes