src/vs/workbench/contrib/notebook/browser/contrib/find/notebookFindReplaceWidget.ts/NotebookFindInput/createFilters
class NotebookFindInput:	private createFilters(container: HTMLElement): void {
		this._actionbar = this._register(new ActionBar(container, {
			actionViewItemProvider: action => {
				if (action.id === this._filtersAction.id) {
					return this.instantiationService.createInstance(NotebookFindFilterActionViewItem, this.filters, action, new ActionRunner());
				}
				return undefined;
			}
		}));
		this._actionbar.push(this._filtersAction, { icon: true, label: false });
	}