'Creates a group from a source'

@cinder_utils.trace
def create_group_from_src(self, context, group, volumes, group_snapshot=None, snapshots=None, source_group=None, source_vols=None):

    msg = _('Creating    a    group    from    a    source    is    not    supported    when    consistent_group_snapshot_enabled    to    true.')
    if (not utils.is_group_a_cg_snapshot_type(group)):
        raise NotImplementedError()
    else:
        raise exception.VolumeBackendAPIException(data=msg)
