lombok/usage_examples/experimental/HelperExample_post.jpage

public class HelperExample {
	int someMethod(int arg1) {
		int localVar = 5;

		class Helpers {
			int helperMethod(int arg) {
				return arg + localVar;
			}
		}
		Helpers $Helpers = new Helpers();

		return $Helpers.helperMethod(10);
	}
}