src/vs/workbench/contrib/typeHierarchy/browser/typeHierarchyTree.ts/TypeRenderer/renderTemplate
class TypeRenderer:	renderTemplate(container: HTMLElement): TypeRenderingTemplate {
		container.classList.add('typehierarchy-element');
		let icon = document.createElement('div');
		container.appendChild(icon);
		const label = new IconLabel(container, { supportHighlights: true });
		return new TypeRenderingTemplate(icon, label);
	}