code: func (p *peer) ReplyHelperTrieProofs(reqID uint64, resp HelperTrieResps) *reply {
  	data, _ := rlp.EncodeToBytes(resp)
  	return &reply{p.rw, HelperTrieProofsMsg, reqID, data}
  }
docs: // ReplyHelperTrieProofs creates a reply with a batch of HelperTrie proofs, corresponding to the ones requested.