def sendFragmentEnd(self, data):         
      self._sendMessage(False, STREAM, data)
Confirm that aggregation works when the aggregated by column does
dataset/ETHPy150Open donothingloop/rtl_heatmap/server/SimpleWebSocketServer.py/WebSocket.sendFragmentEnd--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/corehq/apps/userreports/tests/test_report_aggregation.py/TestReportAggregation.test_aggregation_by_column_not_in_report