export interface UndoManagerDelegate<T> {
    takeSnapshot: () => T;
    measureSnapshot: (snapshot: T) => number;
    restoreSnapshot: (snapshot: T) => void;
}
export declare class UndoManager<T> {
    constructor(delegate: UndoManagerDelegate<T>, maxSize?: number);
    readonly delegate: UndoManagerDelegate<T>;
    readonly maxSize: number;
    private lastSnapshot;
    private isLastSnapshotCommitted;
    private readonly undoStack;
    private undoStackSize;
    private readonly redoStack;
    private pushUndoSnapshot;
    private popUndoSnapshot;
    takeSnapshot(): void;
    commitLastSnapshot(): void;
    get canUndo(): boolean;
    get canRedo(): boolean;
    undo(): void;
    redo(): void;
}