code: func (h *headerRule) Claim(reqCtx *fasthttp.RequestCtx) bool {
  	j := func(reqCtx *fasthttp.RequestCtx) bool {
  		get := func(key string) string {
  			return string(reqCtx.Request.Header.Peek(key))
  		}
  
  		return h.claim(get)
  	}
  	return j(reqCtx)
  }
docs: // Claim validator