// matchedKeys is a stack of the set of all fields that exist in the
	// concrete go type of the object being converted into.
	// This should only be manipulated via `pushMatchedKeyTracker`,
	// `recordMatchedKey`, or `popAndVerifyMatchedKeys`
	matchedKeys []map[string]struct{}
	// parentPath collects the path that the conversion
	// takes as it traverses the unstructured json map.
	// It is used to report the full path to any unknown