[astockwell]

It's not clear from the code; the author probably should clarify what "Goroutine safety" means - for reads or for read/write? Your correct about the approach for native maps.

EDIT: The package description punctuation is hard to grasp, but upon a second read, "Goroutine Safety." might be intended as a headline for the next line, which starts with "No." Read that way, your understanding sounds correct.