nl_parse_nested
if ((error = nl_parse_nested(attrs, &gre_modify_parser, npt, ¶ms)) != 0)
error = nl_parse_nested(lattrs->ifla_idata, &vlan_parser, npt, &attrs);
error = nl_parse_nested(lattrs->ifla_idata, &vlan_parser, ifd->npt, &attrs);
return (nl_parse_nested(nla, &nlbuf_w_parser, ctx->npt, attrs));
return (nl_parse_nested(nla, &test1_parser, ctx->npt, attrs));