Return length of decoded input

[bramp]

Over websocket I receive a stream of objects. I know the byte length of each object, and I want to ensure (as a safety/sanity check) that DecodeObject(...) has fully read the input. I see the private function decodeObject(...) returns the length, but that's not made available to the user.

May I request that either

1. The API is changed to return the length
2. A public field/method is added to the Decoder type, that exposed the number of bytes read.