code: public T withParentClasspath(Collection<URL> classpath) {
  		int nbUrls = classpath.size();
  		if (nbUrls > 0) {
  			URL[] urls = classpath.toArray(new URL[nbUrls]);
  			URLClassLoader urlClassLoader = new URLClassLoader(urls);
  			withParentClassLoader(urlClassLoader);
  		}
  
  		return self();
  	}
docs: Change {@link #parentClassLoader} value.
  
  @param classpath New {@link #parentClassLoader} value.
  @return this