@Override
  public DrillDownInfo drillDown(Record selectedRecord) {
    List<RecordFilter> initialFilters = Collections.singletonList(
      RecordFilter.newBuilder(Field.CLIENT).doubleEquals(selectedRecord.get(Field.CLIENT)));
    return new DrillDownInfo(Mode.USER, initialFilters);
  }
Aggregate the records and count the unique values for the given distinctField
@param records               records to be processed
@param groupBy               Field on which group by needs to be done
@param distinctField         Field whose unique values needs to be counted
@param uniqueCountAssignedTo a target field to which the unique count is assigned to
@return aggregated records
hbase-hbtop/src/main/java/org/apache/hadoop/hbase/hbtop/mode/ClientModeStrategy.java