code: def machines(self):
          
          if self._resources is None:
              self.__init()
          if "machines" in self._resources:
              url = self._url + "/machines"
              return _machines.Machines(url,
                                        securityHandler=self._securityHandler,
                                        initialize=False,
                                        proxy_url=self._proxy_url,
                                        proxy_port=self._proxy_port)
          else:
              return None
docs: gets a reference to the machines object