src/vs/workbench/contrib/typeHierarchy/browser/typeHierarchyPeek.ts/TypeHierarchyTreePeekWidget/showLoading
class TypeHierarchyTreePeekWidget:	showLoading(): void {
		this._parent.dataset['state'] = State.Loading;
		this.setTitle(localize('title.loading', "Loading..."));
		this._show();
	}