code: function fetch(string $name) : self {
          if (!isset(self::$_templates[$name])) {
              Console::warning("View \"$name\" not exist.");
              return $this;
          }
          if (self::$_templates[$name] === false)
              $this->_temp = Server::$memcached->get('view_'.$name);
          else
              $this->_temp = self::$_templates[$name];
          return $this;
      }
docs: 获取视图
  
  @param string $name
  @return self