What does the value type of the resulting map look like?
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) {
var byLen = Stream.of("ant", "bee", "cat", "dog", "elk")
.collect(Collectors.groupingBy(
String::length,
Collectors.counting()));
System.out.println(byLen);
}
}