code: public ClassLoader getUserCodeClassLoader() {
  		if (this.userCodeClassLoader == null) {
  			this.userCodeClassLoader = buildUserCodeClassLoader(jarFiles, classpaths, getClass().getClassLoader());
  		}
  		return this.userCodeClassLoader;
  	}
docs: Gets the {@link java.lang.ClassLoader} that must be used to load user code classes.
  
  @return The user code ClassLoader.