I'm running some custom logic to post-process a yaml document as a plain yaml.Node, which I obtain by :

	var nodes yaml.Node
	if err := decoder.Decode(&nodes); ...

but then I have no way to invoke the actual decoder code.

AFAICT Decoder only access the *parser once by calling parse(). Makes me wonder it would sound correct to refactor this so it relies on some Parser interface, so that one can use:

decoder := &Decoder{
		Parser: customParserProducingNodes(),
	}
decoder.Decode(&myStruct)

would this sound good? Happy to prepare a PR for this purpose