I can't create a stack with the Node object. It said "cannot make a static reference to the non

$-$

static T type". I am using Java $17.$ First java file: public class IterableRedBlackTree$>$ extends RedBlackTree

implements IterableSortedCollection $\{$private static class RBTIterator implements Iterator $\{$

public RBTIterator$($Node root, Comparable startPoint$)\{$

Stack stackNodes $=$ new Stack$>()$;

$\}\}\}|||||||$ Second java file: public class BinarySearchTree$>$ implements SortedCollectionInterface $\{$public static class Node $\{\}\}$