code: func (bsh *BufferedServerHeader) Get(key string) (value []string) {
  	if bsh.released {
  		value = bsh.original.Get(key)
  	} else {
  		if v, found := bsh.headerMap[key]; found && len(v) > 0 {
  			value = v
  		} else {
  			value = bsh.original.Get(key)
  		}
  	}
  	return
  }
docs: // Get this key