code: def bindings(self):
          
          if self._bindings is None:
              self._bindings = BindingList(self._version, service_sid=self._solution['sid'], )
          return self._bindings
docs: Access the bindings
  
          :returns: twilio.rest.chat.v2.service.binding.BindingList
          :rtype: twilio.rest.chat.v2.service.binding.BindingList