def _proxy(self):
        """
        Generate an instance context for the instance, the context is capable of
        performing various actions.  All instance actions are proxied to the context

        :returns: WorkflowStatisticsContext for this WorkflowStatisticsInstance
        :rtype: twilio.rest.taskrouter.v1.workspace.workflow.workflow_statistics.WorkflowStatisticsContext
        """
        if self._context is None:
            self._context = WorkflowStatisticsContext(
                self._version,
                workspace_sid=self._solution['workspace_sid'],
                workflow_sid=self._solution['workflow_sid'],
            )
        return self._context
Generate an instance context for the instance, the context is capable of
        performing various actions.  All instance actions are proxied to the context

        :returns: WorkflowStatisticsContext for this WorkflowStatisticsInstance
        :rtype: twilio.rest.taskrouter.v1.workspace.workflow.workflow_statistics.WorkflowStatisticsContext