code: func Proto(service, name string) (string, error) {
  	template := fmt.Sprintf(templateVar, service, name)
  	return getVar(fmt.Sprintf(template, "PROTO"))
  }
docs: // Proto finds the specified protocol for a service based off of the service's name and which
  // interface you are accessing. Values are found in environment variables fitting the scheme:
  // SERVICE_{SERVICE NAME}_{INTERFACE NAME}_PROTO.