public static boolean url_req(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "url_req")) return false;
    if (!nextTokenIs(b, IDENTIFIER)) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = simple_name(b, l + 1);
    r = r && url_req_1(b, l + 1);
    r = r && urlspec(b, l + 1);
    r = r && url_req_3(b, l + 1);
    exit_section_(b, m, URL_REQ, r);
    return r;
  }
public static boolean url_req(PsiBuilder b, int l)