code: def interactions(self):
          
          if self._interactions is None:
              self._interactions = InteractionList(
                  self._version,
                  service_sid=self._solution['service_sid'],
                  session_sid=self._solution['sid'],
              )
          return self._interactions
docs: Access the interactions
  
          :returns: twilio.rest.proxy.v1.service.session.interaction.InteractionList
          :rtype: twilio.rest.proxy.v1.service.session.interaction.InteractionList