/**
 * Compares keys between two objects and returns an array of missing keys in the second object.
 * Nested objects are also checked.
 *
 * @template T
 * @param {T} obj1 - The first object to compare keys.
 * @param {T} obj2 - The second object to compare keys against.
 * @return {string[]} - An array of missing keys in `obj2` compared to `obj1`.
 */
export declare function compareKeys<T extends {
    [key: string]: any;
}>(obj1: T, obj2: T, prefix?: string): string[];