def METHOD_NAME(self) -> str:
    identity_store_id = self._get_param("IdentityStoreId")
    display_name = self._get_param("DisplayName")
    description = self._get_param("Description")
    group_id, identity_store_id = self.identitystore_backend.METHOD_NAME(
        identity_store_id=identity_store_id,
        display_name=display_name,
        description=description,
    )
    return json.dumps(dict(GroupId=group_id, IdentityStoreId=identity_store_id))