The start/stop functions were introduced in https://go-review.googlesource.com/#/c/9879/ Change-Id: I7aafadcbe78b60bb512c2de05f3f992e47f0df6e Reviewed-on: https://go-review.googlesource.com/10372 Reviewed-by: Dmitri Shuralyov <shurcool@gmail.com> Reviewed-by: David Crawshaw <crawshaw@golang.org>