code: def _fetch(self):
          
          if 'uri' in self._meta_data:
              error = "There was an attempt to assign a new uri to this "\
                      "resource, the _meta_data['uri'] is %s and it should"\
                      " not be changed." % (self._meta_data['uri'])
              raise URICreationCollision(error)
          # Make convenience variable with short names for this method.
          _create_uri = self._meta_data['container']._meta_data['uri']
          session = self._meta_data['bigip']._meta_data['icr_session']
          # Invoke the REST operation on the device.
          response = session.post(_create_uri, json={})
          # Make new instance of self
          return self._produce_instance(response)
docs: wrapped by `fetch` override that in subclasses to customize