Method attachNullToParent

lib/java/util/TreeMap.java:2157–2171

(Node<K, V> toDelete)

    }

    private void attachNullToParent(Node<K, V> toDelete) {
        Node<K, V> parent = toDelete.parent;
        if (parent == null) {
            root = null;
        } else {
            if (toDelete == parent.left) {
                parent.left = null;
            } else {
                parent.right = null;
            }
            if (!toDelete.color) {
                fixup(parent);
            }
        }
    }

    private void fixNextChain(Node<K, V> node) {
        if (node.prev != null) {