import { FocusTrapInstance } from './types';
export declare class FocusTrapManager {
    private static manager;
    static getInstance(): FocusTrapManager;
    private instances;
    private direction;
    private lastActiveElement;
    private raf?;
    private constructor();
    activate(instance: FocusTrapInstance): void;
    deactivate(instance: FocusTrapInstance): void;
    private autoFocus;
    private focusScope;
    private checkFocusInCurrentScope;
    private preventLastFocusIn;
    private checkFocusIn;
    private attachEvents;
    private detachEvents;
    private onDocumentFocusIn;
    private onDocumentKeyDown;
    private onMouseDown;
}