@Override
  public String toString() {
    return new ToStringBuilder(this).append("regionName", regionName).append("params", params)
      .append("scan", scan).toString();
  }
SlowLog params object that contains detailed info as params and region name : to be used for
filter purpose
hbase-client/src/main/java/org/apache/hadoop/hbase/client/SlowLogParams.java