https://chromium.googlesource.com/external/github.com/luci/luci-go/+/5251ea3062e8c1be9e483d1e3d7a0cd4640cf4fe/luci_config/server/cfgclient/backend/backend.go
luci_config/server/cfgclient/backend/backend.go - external/github.com/luci/luci-go - Git at Google