public static boolean pct_encoded(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "pct_encoded")) return false;
    if (!nextTokenIs(b, PERCENT_SIGN)) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = consumeToken(b, PERCENT_SIGN);
    r = r && hexdig(b, l + 1);
    exit_section_(b, m, PCT_ENCODED, r);
    return r;
  }
public static boolean pct_encoded(PsiBuilder b, int l)