import java.util.function.IntFunction;

public class Main {

//@Repeatable

//@interface RepeatableAnnotation {}

@interface NotRepeatableAnnotation {}

public static void main(String[] args) {

/*

# Lambda

Define a function without name.

*/

IntFunction<Integer> f = (int x) -> { return x + 1; };

assert f.apply(1) == 2;

/*

# Repeatable

*/

{

// TODO how are all visible at once?

}

}

}