import { Overlay, OverlayConfig, OverlayRef } from '@angular/cdk/overlay';
import { ThemeBaseDirective } from './theme-base.directive';
import * as i0 from "@angular/core";
/**
 * NOTE: Providing a theme-aware OverlayContainer was a solution for overlay styles we used to have.
 * It proved error-prone since it can lead to multiple overlay containers, which can cause
 * z-index issues in various scenarios (UC-4160, UC-2897, UC-3843).
 * The current solution applies.
 */
/**
 * Sapphire theme aware overlay service.
 * It's a slim wrapper around CDK Overlay service that adds theme styles to the overlay container.
 */
export declare class SapphireOverlay extends Overlay {
    private topLevelThemeRef;
    private theme;
    /**
     * Same as Angular CDK's `overlay.create`,
     * but applies the current theme style on the overlay container.
     * @param overlayConfig The overlay configuration to pass to overlay.create()
     * @param theme The theme to apply. If not provided, the current theme will be used.
     */
    create(overlayConfig?: OverlayConfig, theme?: ThemeBaseDirective): OverlayRef;
    /**
     * Applies the current theme style on the overlay container.
     * Useful only when the overlay is not created using `SapphireOverlay.create` method.
     * E.g. when using some higher-level service like Dialog from angular CDK.
     * @param overlayRef The overlay reference to apply the theme on.
     * @param theme The theme to apply. If not provided, the current theme will be used.
     */
    applyTheme(overlayRef: OverlayRef, theme?: ThemeBaseDirective): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SapphireOverlay, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SapphireOverlay>;
}