/**
 * Finds the nearest own descriptor for a property across an object's prototype chain.
 * @param {object} source - Object whose chain is inspected.
 * @param {PropertyKey} key - Property key to resolve.
 * @returns {PropertyDescriptor | undefined} Nearest descriptor, if present.
 */
export declare function ObjectFindPropertyDescriptor(source: object, key: PropertyKey): PropertyDescriptor | undefined;