ng-track-by/lib/tools/change-track-by.d.ts

trackBy and trackById directives which provide TrackByFunction to ngForTrackBy

import { NgForOf } from "@angular/common";
import { TrackByFunction } from "@angular/core";
export declare function changeTrackBy(ngForOf: NgForOf<any, any>, trackBy: TrackByFunction<any>, property: string): void;