import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
export declare class JsontestService {
    private httpClient;
    private jsonTest;
    constructor(httpClient: HttpClient);
    echoJson(key: string, value: string): Observable<Object>;
    getDateTime(): Observable<Object>;
    getHeaders(): Observable<Object>;
    getInformation(): Observable<any>;
    getMD5(text: string): Observable<Object>;
    getMyIpAddress(): Observable<Object>;
    validateJsonData(data: {}): Observable<Object>;
}