public take(nodes: INodeSequence<Node>): void {
   if (Tracer.enabled) { Tracer.enter('ShadowDOMProjector', 'take', slice.call(arguments)); }
   nodes.remove();
   if (Tracer.enabled) { Tracer.leave(); }
 }

 public project(nodes: INodeSequence<Node>): void {
   if (Tracer.enabled) { Tracer.enter('ShadowDOMProjector', 'project', slice.call(arguments)); }
   nodes.appendTo(this.shadowRoot);
   if (Tracer.enabled) { Tracer.leave(); }
 }

 public $unmount() {
   this.$state &= ~State.isMounted;
   this.$nodes.remove();
 }