code: def label(self, name, value, cluster_ids=None):
          
          if cluster_ids is None:
              cluster_ids = self.cluster_view.selected
          if not hasattr(cluster_ids, '__len__'):
              cluster_ids = [cluster_ids]
          if len(cluster_ids) == 0:
              return
          self.cluster_meta.set(name, cluster_ids, value)
          self._global_history.action(self.cluster_meta)
docs: Assign a label to clusters.
  
          Example: `quality 3`