code: def get_instance(self, payload):
          
          return WorkflowStatisticsInstance(
              self._version,
              payload,
              workspace_sid=self._solution['workspace_sid'],
              workflow_sid=self._solution['workflow_sid'],
          )
docs: Build an instance of WorkflowStatisticsInstance
  
          :param dict payload: Payload response from the API
  
          :returns: twilio.rest.taskrouter.v1.workspace.workflow.workflow_statistics.WorkflowStatisticsInstance
          :rtype: twilio.rest.taskrouter.v1.workspace.workflow.workflow_statistics.WorkflowStatisticsInstance