import { Observable } from "rxjs";
/**
 * Provides additional information about Observable request. Used by {@link trackStatus}
 */
export interface RequestStatus<T> {
    isLoading: boolean;
    value?: T;
    error?: any;
}
/**
 * Wraps Observable into a RequestStatus object that provides additional information: isLoading, error, etc.
 *
 * @example
 * <ng-container *ngIf="trackStatusObservable$ | async as request">
 *   {{ request.isLoading ? "loading" : request.value }}
 * </ng-container>
 * @param observable
 * @returns
 */
export declare function trackStatus<T>(observable: Observable<T>): Observable<RequestStatus<T>>;
/**
 * Adds support of executing request retries on refresh interval with initial execution delay
 */
export declare class AsyncWrapper<TValue, TError = any> {
    private isValueLoading;
    readonly error: Observable<TError | null>;
    readonly value: Observable<TValue>;
    get isLoading(): boolean;
    constructor(provider: () => Observable<TValue>, settings: {
        refreshInterval: number;
        initialDelay?: number;
    });
}