src/vs/base/browser/ui/tree/abstractTree.ts/TypeFilter/constructor
class TypeFilter:	constructor(
		private tree: AbstractTree<T, any, any>,
		private keyboardNavigationLabelProvider: IKeyboardNavigationLabelProvider<T>,
		private _filter?: ITreeFilter<T, FuzzyScore>
	) {
		tree.onWillRefilter(this.reset, this, this.disposables);
	}