import "reflect-metadata";
import { ISaveEventParam } from "../../MetaData/Interface/ISaveEventParam";
/**
 * Register before save event. only for concrete
 * @handler: if named function was passed, then it will override last function with the same name
 */
export declare function BeforeSave<T = any>(handler?: (this: T, item?: ISaveEventParam) => boolean): MethodDecorator & ClassDecorator;