func (api *API) PreferenceLocator(href string) *PreferenceLocator {
	return &PreferenceLocator{Href(href), api}
}
func (api *API) PreferenceLocator(href string) *PreferenceLocator {
	return &PreferenceLocator{Href(href), api}
}
// PreferenceLocator builds a locator from the given href.