code: func (h Headers) Value(k string) string {
  	for i := 0; i < len(h); i += 2 {
  		if h[i] == k {
  			return h[i+1]
  		}
  	}
  	return ""
  }
docs: /*
  	Value returns a header value for a specified key.  If the key is not present
  	an empty string is returned.
  */