DrainNode uses the default drain implementation to drain the Node: https://github.com/kubernetes/kubectl/blob/3ec401449e5821ad954942c7ecec9d2c90ecaaa1/pkg/drain/default.go.

NewScheme creates a new scheme: https://book.kubebuilder.io/cronjob-tutorial/gvks.html#err-but-whats-that-scheme-thing.

ParseWatchEventObject determines if the specified watch event is an error and if so returns an error and otherwise asserts and returns an object of the expected type.

PortForward port forwards to the specified Pod.

https://github.com/kubernetes/autoscaler/blob/5bf33b23f2bcf5f9c8ccaf99d445e25366ee7f40/cluster-autoscaler/utils/taints/taints.go#L39-L42.