src/vs/workbench/contrib/typeHierarchy/browser/typeHierarchyTree.ts/Type/compare
class Type:	static compare(a: Type, b: Type): number {
		let res = compare(a.item.uri.toString(), b.item.uri.toString());
		if (res === 0) {
			res = Range.compareRangesUsingStarts(a.item.range, b.item.range);
		}
		return res;
	}