import { DataChangedInfo } from '../../Interface/DataChangedInfo';
import { IEvent } from '../../Interface/IEvent';
export declare enum ChangeDirection {
    Up = "Up",
    Down = "Down",
    Ignore = "Ignore"
}
export interface IDataService {
    CreateDataChangedEvent(dataChangedInfo: DataChangedInfo): void;
    OnDataSourceChanged(): IEvent<IDataService, DataChangedInfo>;
    GetPreviousColumnValue(columnId: string, identifierValue: any, newValue: number, changeDirection: ChangeDirection): number;
}