agent/engine/docker_task_engine.go
func (engine *DockerTaskEngine) Version() (string, error) {
	return engine.client.Version(engine.ctx, dockerclient.VersionTimeout)
}
func (engine *DockerTaskEngine) Version() (string, error) {
	return engine.client.Version(engine.ctx, dockerclient.VersionTimeout)
}
// Version returns the underlying docker version.