src/vs/base/browser/ui/tree/abstractTree.ts/TreeRenderer/renderElement
class TreeRenderer:	renderElement(node: ITreeNode<T, TFilterData>, index: number, templateData: ITreeListTemplateData<TTemplateData>, height: number | undefined): void {
		this.renderedNodes.set(node, templateData);
		this.renderedElements.set(node.element, node);
		this.renderTreeElement(node, templateData);
		this.renderer.renderElement(node, index, templateData.templateData, height);
	}