private static boolean conditional_command_0(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "conditional_command_0")) return false;
    boolean r, p;
    Marker m = enter_section_(b, l, _NONE_);
    r = consumeToken(b, LEFT_DOUBLE_BRACKET);
    p = r; // pin = 1
    r = r && report_error_(b, conditional_command_0_1(b, l + 1));
    r = p && conditional_command_0_2(b, l + 1) && r;
    exit_section_(b, l, m, r, p, null);
    return r || p;
  }
private static boolean conditional_command_0(PsiBuilder b, int l)