Joe Tsai 174b9ecfe3 all: document that Unmarshal must be a mutable message
Fixes #937

Change-Id: I40b2678eba0195ed01676167f8e01e2fedea293b
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/302329
Trust: Joe Tsai <joetsai@digital-static.net>
Reviewed-by: Damien Neil <dneil@google.com>
2021-03-16 20:06:34 +00:00
..