/**
 * If first object is not nil, it'll merge with second object. (First over second)
 * Otherwise, it'll return second object.
 *
 * @export
 * @template T Object type
 * @param {(T | Partial<T>)} first First object
 * @param {(T | Partial<T>)} second Second object
 * @returns {(T | Partial<T>)}
 */
export default function ifMerge<T>(first: T | Partial<T>, second: T | Partial<T>): T | Partial<T>;