private static boolean nl_throws_1(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "nl_throws_1")) return false;
    boolean r;
    r = non_empty_throws_clause(b, l + 1);
    if (!r) r = empty_throws_clause(b, l + 1);
    return r;
  }
private static boolean nl_throws_1(PsiBuilder b, int l)