private static boolean variable_name_1_0(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "variable_name_1_0")) return false;
    boolean r;
    r = consumeToken(b, LETTER);
    if (!r) r = consumeToken(b, DIGIT);
    if (!r) r = consumeToken(b, UNDERSCORE);
    return r;
  }
private static boolean variable_name_1_0(PsiBuilder b, int l)