import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
export declare class DataService {
    private http;
    private apiUrl;
    private httpHeaders;
    private endPoint;
    constructor(http: HttpClient, endPoint: string, apiUrl?: string);
    getValues(): Observable<any[]>;
    getSomething<T>(): Observable<T>;
    getEntities<T>(params?: {}): Observable<T[]>;
    getEntity<T>(id?: number, params?: {}): Observable<T>;
    private getUrl;
    doSomething(): void;
    saveValue<T>(params?: {}): Observable<T>;
}