type Callback<T, E extends Error> = (result: T, error: E | null) => void;
type Func<T, R, E extends Error> = (...args: [...T[], Callback<R, E>]) => void;
/**
 * Promisifies a callback-based function.
 * @param func - The callback-based function to promisify.
 * @returns A promise-wrapped function.
 */
export default function promisify<T, R, E extends Error>(func: Func<T, R, E>): (...args: T[]) => Promise<R>;
export {};