static boolean open_block_impl(PsiBuilder b, int l) {
    if (!recursion_guard_(b, l, "open_block_impl")) return false;
    if (!nextTokenIs(b, T_LBRACE)) return false;
    boolean r, p;
    Marker m = enter_section_(b, l, _NONE_);
    r = consumeToken(b, T_LBRACE);
    p = r; // pin = 1
    r = r && report_error_(b, mb_separators(b, l + 1));
    r = p && report_error_(b, block_levels(b, l + 1)) && r;
    r = p && consumeToken(b, T_RBRACE) && r;
    exit_section_(b, l, m, r, p, null);
    return r || p;
  }
static boolean open_block_impl(PsiBuilder b, int l)