code: func InitContainerdRuntime(experimental bool, cdPath string) {
  	if experimental && len(cdPath) > 0 && len(os.Getenv("DOCKER_WINDOWS_CONTAINERD_RUNTIME")) > 0 {
  		logrus.Warnf("Using ContainerD runtime. This feature is experimental")
  		containerdRuntimeSupported = true
  	}
  }
docs: // InitContainerdRuntime sets whether to use ContainerD for runtime
  // on Windows. This is an experimental feature still in development, and
  // also requires an environment variable to be set (so as not to turn the
  // feature on from simply experimental which would also mean LCOW.