When new versions of gRPC are released, the wire.proto can be processed by running the commands below from the base of the git repository.
# Make sure your protoc is version 3.1+
protoc --version
# Go get and generate.
go install google.golang.org/grpc/cmd/[email protected]
go install google.golang.org/protobuf/cmd/protoc-gen-go
protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative wire.proto