private static boolean IPv6address_4(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "IPv6address_4")) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = IPv6address_4_0(b, l + 1);
    r = r && consumeTokens(b, 0, COLON, COLON);
    r = r && h16_colon(b, l + 1);
    r = r && h16_colon(b, l + 1);
    r = r && ls32(b, l + 1);
    exit_section_(b, m, null, r);
    return r;
  }
private static boolean IPv6address_4(PsiBuilder b, int l)