import { type Callback } from './definitions.ts';
export declare const kCallbackPromise: unique symbol;
export declare const kNoopCallbackReturnValue: unique symbol;
export declare const noopCallback: CallbackWithPromise<any>;
export type CallbackWithPromise<ReturnType> = Callback<ReturnType> & {
    [kCallbackPromise]?: Promise<ReturnType>;
};
export declare function createPromisifiedCallback<ReturnType>(): CallbackWithPromise<ReturnType>;
export declare function runConcurrentCallbacks<ReturnType, K, V>(errorMessage: string, collection: Map<K, V>, operation: (item: [K, V], cb: Callback<ReturnType>) => void, callback: Callback<ReturnType[]>): void;
export declare function runConcurrentCallbacks<ReturnType, V>(errorMessage: string, collection: Set<V>, operation: (item: V, cb: Callback<ReturnType>) => void, callback: Callback<ReturnType[]>): void;
export declare function runConcurrentCallbacks<ReturnType, V>(errorMessage: string, collection: V[], operation: (item: V, cb: Callback<ReturnType>) => void, callback: Callback<ReturnType[]>): void;