lectedElement===undefined)return;if(e.keyCode===38){const prev=Polymer.dom(this.selectedElement).previousSibling;if(prev){prev.selected=true;tr.ui.b.scrollIntoViewIfNeeded(prev);e.preventDefault();return true;}}else if(e.keyCode===40){const next=Polymer.dom(this.selectedElement).nextSibling;if(next){next.selected=true;tr.ui.b.scrollIntoViewIfNeeded(next);e.preventDefault();return true;}}},addItem(textContent){const item=document.createElement('div');Polymer.dom(item).textContent=textContent;Poly...