export interface Constructor<T = {}> {
    new (...args: any[]): T;
}
/**
 * Given a Functional constructor (a function that returns an object, but is not meant to be used with `new`), return a Class that can be extended
 *
 * Example:
 * ```js
 * const BaseMoment = makeExtensible(moment);
 * class SubMoment extends BaseMoment { }
 * ```
 */
export declare function makeExtensible<T>(constructCall: (...args: any[]) => T, prototype?: any): Constructor<T>;