def add_lun(self, luns):
curr_lun_ids, curr_smp_names = self._get_current_names()<EOL>luns = normalize_lun(luns, self._cli)<EOL>new_ids, new_smps = convert_lun(luns)<EOL>if new_ids:<EOL><INDENT>curr_lun_ids.extend(new_ids)<EOL><DEDENT>if new_smps:<EOL><INDENT>curr_smp_names.extend(new_smps)<EOL><DEDENT>return self.modify(lun_ids=curr_lun_ids, smp_names=curr_smp_names)<EOL>
A wrapper for modify method.

        .. note:: This API only append luns to existing luns.