code: def execution_context(self):
          
          if self._execution_context is None:
              self._execution_context = ExecutionContextList(
                  self._version,
                  flow_sid=self._solution['flow_sid'],
                  execution_sid=self._solution['sid'],
              )
          return self._execution_context
docs: Access the execution_context
  
          :returns: twilio.rest.studio.v1.flow.execution.execution_context.ExecutionContextList
          :rtype: twilio.rest.studio.v1.flow.execution.execution_context.ExecutionContextList