import { HttpClient } from "@angular/common/http"; import { Injectable } from "@angular/core"; import { Observable } from "rxjs"; import { CityService } from "./city.service"; import { CountryService } from "./country.service"; import { forkJoin } from 'rxjs'; @Injectable({ providedIn: 'root' }) export class PlaceService{ constructor(private httpClient : HttpClient, private cityService: CityService, private countryService : CountryService){} }