def METHOD_NAME(self, source_group, target_group, external=False):
    """ Make source group member of target group """
    if external:
        add_mem = "ipa -n group-add-member %s "\
                  "--external %s" % (target_group, source_group)
    else:
        add_mem = "ipa group-add-member %s --groups %s" % (target_group,
                                                           source_group)
    cmd = self.multihost.run_command(add_mem, raiseonerr=False)
    if cmd.returncode != 0:
        raise SSSDException(cmd.stderr_text)