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