return null;
else return value;
  public static MysqliResult mysqli_query(@NotNull Mysqli conn,                                          String sql,                                          @Optional("MYSQLI_STORE_RESULT") int resultMode)  {    // ERRATUM: <i>resultMode</i> is ignored, MYSQLI_USE_RESULT would represent    //  an unbuffered query, but that is not supported.    JdbcResultResource resultResource = query(conn, sql);    if (resultResource != null) {      return new MysqliResult(resultResource);    }    return null;  }