export interface EventRoot {
    addEventListener: Document['addEventListener'];
    removeEventListener: Document['removeEventListener'];
}
export interface Dialog {
    close: () => boolean;
}
export declare class DialogManager {
    private readonly deps;
    private dialogs;
    constructor(deps: {
        eventRoot: EventRoot;
    });
    register(dialog: Dialog): void;
    forget(dialog: Dialog): void;
    readonly handleKeydown: (event: KeyboardEvent) => void;
    closeLatest(): void;
    private removeHandleKeydownEventListenerIfNecessary;
}