Imports github.com/gogo/protobuf/proto golang.org/x/net/context github.com/golang/protobuf/ptypes/empty github.com/opencontainers/go-digest github.com/gogo/protobuf/sortkeys github.com/gogo/protobuf/gogoproto google.golang.org/grpc github.com/gogo/protobuf/types Standard library imports fmt io math reflect strings time