import { Observable } from 'rxjs';
import { HistoryData } from './history-manager.service';
export interface HistoryManagerServiceInterface {
    onChange: Observable<HistoryData>;
    currentData: HistoryData;
    undoable: boolean;
    redoable: boolean;
    undo(steps: number): void;
    redo(steps: number): void;
    push(record: HistoryData): void;
    empty(): void;
}