code: def get_default_handler(self, **kw):
          
          gke_cluster_name = retrieve_metadata_server(_GKE_CLUSTER_NAME)
  
          if (
              _APPENGINE_FLEXIBLE_ENV_VM in os.environ
              or _APPENGINE_INSTANCE_ID in os.environ
          ):
              return AppEngineHandler(self, **kw)
          elif gke_cluster_name is not None:
              return ContainerEngineHandler(**kw)
          else:
              return CloudLoggingHandler(self, **kw)
docs: Return the default logging handler based on the local environment.
  
          :type kw: dict
          :param kw: keyword args passed to handler constructor
  
          :rtype: :class:`logging.Handler`
          :returns: The default log handler based on the environment