在源代码k8s.io/kubernetes/pkg/kubelete/server/portforward中，有一个接口

// PortForwarder knows how to forward content from a data stream to/from a port in a pod.
type PortForwarder interface {
    // PortForwarder copies data between a data stream and a port in a pod.
    PortForward(name string,uid types.UID,port int32,stream io.ReadWritecloser) error
}

我如何实现它？