import { Disposable } from "./Disposable";
export declare class Undo implements Undo, Disposable {
    private state;
    private transactionCompleted;
    private undoStack;
    private redoStack;
    private enabled;
    private currentState;
    private quit;
    constructor(state: any, transactionCompleted?: (currentState: any, previousState: any) => void);
    dispose(): void;
    private observe();
    private swap(source, target);
    readonly canUndo: boolean;
    undo(): void;
    readonly canRedo: boolean;
    redo(): void;
}