/**
 * Iterates over the properties of an object and invokes a callback function for each property.
 *
 * @param obj - The object to iterate over.
 * @param callback - The callback function to invoke for each property. It receives the value and key of the property.
 * @returns void
 */
export default function forIn(obj: any, callback: (value: any, key: string) => void): void;