private boolean jj_3R_420() {
    Token xsp;
    xsp = jj_scanpos;
    if (jj_3R_434()) jj_scanpos = xsp;
    if (jj_scan_token(IS)) return true;
    xsp = jj_scanpos;
    if (jj_3R_435()) jj_scanpos = xsp;
    if (jj_3R_57()) return true;
    return false;
  }