private static boolean code_reference_identifiers_2_1(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "code_reference_identifiers_2_1")) return false;
    boolean r;
    Marker m = enter_section_(b);
    r = isQualifiedName(b, l + 1);
    if (!r) r = code_reference_identifiers_2_1_1(b, l + 1);
    exit_section_(b, m, null, r);
    return r;
  }
private static boolean code_reference_identifiers_2_1(PsiBuilder b, int l)