docs: public void removeURLs(URL... urls) {
  		final Set<URL> set = new HashSet<>();
  		set.addAll(Arrays.asList(this.ucp.getURLs()));
  		set.removeAll(Arrays.asList(urls));
  		final URL[] tab = new URL[set.size()];
  		set.toArray(tab);
  		this.ucp = new sun.misc.URLClassPath(tab);
  	}