import { OnDestroy } from '@angular/core';
import { Overlay } from '@angular/cdk/overlay';
import { Subject } from 'rxjs';
import * as i0 from "@angular/core";
export declare class SpinnerOverlayService implements OnDestroy {
    private overlay;
    private readonly _spinner;
    spin$: Subject<boolean>;
    constructor(overlay: Overlay);
    ngOnDestroy(): void;
    private _createSpinner;
    private _show;
    private _hide;
    static ɵfac: i0.ɵɵFactoryDeclaration<SpinnerOverlayService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SpinnerOverlayService>;
}