Protobuf definitions for use in recipes and recipe modules. e.g:
from PB.foo.proto import Foo
Retrieve https://chromium.googlesource.com/infra/luci/luci-go.git and copy the cq.proto from it:
cp ${LUCI}/cq/api/config/v2/cq.proto go.chromium.org/luci/cq/api/config/v2
and then comment out the options until http://fxb/46095 is resolved.
As a general note, only add the ones that are not already in recipes-py at https://chromium.googlesource.com/infra/luci/recipes-py.git/+/master/recipe_proto/