/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.function.ToIntFunction;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	  static int counter = 0;
 
    public static void main(String[] args) {
        foo2(Collections.nCopies(100, "X"), s -> {
            counter++;
            return s.length();
        });
        System.out.println(counter);
    }
 
    static <T> void foo2(Collection<? extends T> collection, ToIntFunction<? super T> function) {
        collection.stream()
                  .max(Comparator.comparingInt(function))
                  .get();
    }
}

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