import { Constructor } from "../types.js";
export declare function useSingleton(): {
    instanceByDefinition: Map<any, any>;
    getInstanceByDefinition: <T extends Constructor<any>>(definition: T, ...params: ConstructorParameters<T>) => InstanceType<T>;
    getInstanceByKey: <T extends Constructor<any>>(key: any, definition: T, ...params: ConstructorParameters<T>) => InstanceType<T>;
};