code: def create_config(self, env, conf):
          
  
          if not isinstance(conf, collections.Mapping):
              raise ValueError("conf must be a collections.Mapping")
  
          self.zk.ensure_path(self.view_path)
  
          self._create(
              self._get_env_path(env),
              conf
          )
  
          self._update_view(env)
docs: Set conf to env under service.
  
          pass None to env for root.