code: def delete(self, collection_name, obj):
          
          updated = self.transform(
              [collection_name],
              lambda c: obj.delete_from(c),
          )
          return updated
docs: Delete an existing object.
  
          :param unicode collection_name: The name of the collection from which
              to delete the object.
  
          :param IObject obj: A description of the object to delete.
  
          :return _KubernetesState: A new state based on the current state but
              not containing ``obj``.