import { IOverlay, OverlayConfig, OverlaySourceModule } from '../interfaces';
import { OverlayManager } from './overlayManager';
export declare class Overlay implements IOverlay {
    private _manager;
    url: string;
    title: string;
    source: string;
    hidden: boolean;
    parent: IOverlay;
    module: OverlaySourceModule;
    isSystemPopup: boolean;
    registryUrl: string;
    _queue: any[];
    _isFrameLoaded: boolean;
    private _msgCount;
    readonly id: string;
    frame: HTMLIFrameElement;
    registered: boolean;
    onmessage: (topic: string, message: any) => void;
    onclose: Function;
    onregisteredchange: (value: boolean) => void;
    isError: boolean;
    constructor(_manager: OverlayManager, config: OverlayConfig);
    /**
     * Opens tab. If it doesn't exist, then adds tab to the panel.
     */
    open(callback?: Function): void;
    /**
     * Removes tab from the panel.
     */
    close(): void;
    send(topic: string, args: any[]): void;
    private _send;
    exec(topic: string, message: any): Promise<unknown>;
    onMessage(handler: (topic: string, message: any) => void): {
        off: () => void;
    };
    checkAvailability(): Promise<void>;
}