* Reads a tag - field number and wire type.

* Join the last fork. Write its length and bytes, then * return to the previous state.

* Write a `uint32` value, an unsigned 32 bit varint.

* Start a new fork for length-delimited data like a message * or a packed repeated field. * * Must be joined later with `join()`.

* Skip one element on the wire and return the skipped data. * Supports WireType.StartGroup since v2.0.0-alpha.23.

* Read a `int32` field, a signed 32 bit varint.

* Reads a message from canonical JSON format into the target message. * * Repeated fields are appended. Map entries are added, overwriting

* Read a `string` field, length-delimited data converted to UTF-8 text.

* Converts the message to a JSON object, based on the field descriptors.