Method ngOnDestroy

src/aria/tree/tree-item.ts:153–158

()

  }

  ngOnDestroy() {
    if (this.parent() instanceof TreeItemGroup) {
      (this.parent() as TreeItemGroup<V>)._unregister(this);
    }
    this.tree()._collection.unregister(this);
  }

  _register(group: TreeItemGroup<V>) {
    this._group.set(group);