import { HttpClient, HttpParams } from '@angular/common/http';
import { Observable } from 'rxjs';
export declare class APIService {
    private http;
    baseUrl: String;
    constructor(http: HttpClient);
    /**
     * Potentially overridden by subclasses.
     */
    getHeaders(): HttpParams;
    get(url: string, params?: any, baseUrl?: string): Observable<any>;
    post(url: string, body: any, baseUrl?: string): Observable<any>;
    put(url: string, body: any, baseUrl?: string): Observable<any>;
    postTest(url: string, body: any, baseUrl?: string): Observable<any>;
}