/**
 * Deep merges two objects, recursively merging nested objects.
 * Arrays are replaced, not merged. Functions are copied by reference.
 * @param {any} target - The target object to merge into
 * @param {any} source - The source object to merge from
 * @returns {any} The merged object
 */
export declare const deepMerge: (target: any, source: any) => any;