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export type Entity = 
 | {
     type: "user"
}| {
     type: "post"
}| {
     type: "comment"
};
  

ibhargav90

import { Injectable, OnDestroy } from '@angular/core';
import { NavigationEnd, Router, RoutesRecognized } from '@angular/router';
import { filter, pairwise } from 'rxjs/operators';
import { BehaviorSubject } from 'rxjs';
import { Location } from '@angular/common';
import { CommonUtilsService } from './common-utils.service';
import { untilDestroyed } from './until-destroyed';
import { AppConstants } from '../../app.constants';

@Injectable({

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Source : Learn to combine RxJs sequences with super intuitive interactive diagrams

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