import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class ApiService {
    private http;
    constructor(http: HttpClient);
    fetchGetUrl(url: string, data?: any): Observable<any>;
    fetchPostUrl(url: string, data?: null): Observable<any>;
    fetchPutUrl(url: string, data?: {}): Observable<any>;
    fetchDelete(url: string, data: any): Observable<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<ApiService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ApiService>;
}