code: def _proxy(self):
          
          if self._context is None:
              self._context = FlexFlowContext(self._version, sid=self._solution['sid'], )
          return self._context
docs: Generate an instance context for the instance, the context is capable of
          performing various actions.  All instance actions are proxied to the context
  
          :returns: FlexFlowContext for this FlexFlowInstance
          :rtype: twilio.rest.flex_api.v1.flex_flow.FlexFlowContext