code: func (p *peer) RequestBodies(reqID, cost uint64, hashes []common.Hash) error {
  	p.Log().Debug("Fetching batch of block bodies", "count", len(hashes))
  	return sendRequest(p.rw, GetBlockBodiesMsg, reqID, cost, hashes)
  }
docs: // RequestBodies fetches a batch of blocks' bodies corresponding to the hashes
  // specified.