liberry/src/app/providers/provideAsParent.ts

liberry is a command utility to help you easily set up, develop, and host your own project pattern library.

import {provide, forwardRef} from '@angular/core';
import {Parent} from '../constants/DependencyTokens';

export default function provideAsParent(component) {
    return provide(Parent, {useExisting: forwardRef(() => component)});
};