private boolean jj_3R_30() {
    if (jj_scan_token(LCB)) return true;
    Token xsp;
    while (true) {
      xsp = jj_scanpos;
      if (jj_3R_56()) { jj_scanpos = xsp; break; }
    }
    if (jj_scan_token(RCB)) return true;
    return false;
  }