CSC403: More Size: How is this different? [2/10]

public class IntSet {
    private Node root;
    private static class Node {
        public final int key;
        public Node left, right;
        public Node (int key) { this.key = key; }
    }
    int size = 0;
    public int size () {
        for (int x : this.levelOrder ())
            size++;
       return size;
    }
    ...

This now violates yet another criterion of the assignment.

• no fields.

A field is a variable that is declared outside of a method.