type CallbackFn<T> = (args: T) => void;
export type EventEmitter<T extends Record<string, unknown>> = {
    on: <U extends keyof T>(event: U, callback: CallbackFn<T[U]>) => () => void;
    emit: <U extends keyof T>(event: U, arg?: T[U]) => void;
    removeAllListeners: <U extends keyof T>(event?: U) => void;
};
export declare const createEventEmitter: <T extends Record<string, unknown>>() => EventEmitter<T>;
export {};