static private boolean jj_3R_15() {
    if (jj_scan_token(ON)) return true;
    if (jj_3R_18()) return true;
    if (jj_scan_token(LBRACE)) return true;
    Token xsp;
    while (true) {
      xsp = jj_scanpos;
      if (jj_3_8()) { jj_scanpos = xsp; break; }
    }
    while (true) {
      xsp = jj_scanpos;
      if (jj_3_9()) { jj_scanpos = xsp; break; }
    }
    xsp = jj_scanpos;
    if (jj_3_10()) jj_scanpos = xsp;
    if (jj_scan_token(RBRACE)) return true;
    return false;
  }