private void opWithClientMetricRegisterAndMark(Object op) {
      // // Mark client + access type metric
      String opWithClientMeterName = opWithClientMeterName(op);
      if (opWithClientMeterName == null || opWithClientMeterName.isEmpty()) {
        return;
      }
      registerAndMarkMeter(opWithClientMeterName);
    }
Get regionId from Ops such as: get, put, delete.
@param op such as get, put or delete.
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/MetaTableMetrics.java