type WatchedProps<Props> = {
    [key in keyof Props]?: unknown;
};
type Constructor<Props> = new (...args: any[]) => {
    props: Props;
    onPropsChange(changedProps: WatchedProps<Props>): void;
    render(): React.ReactNode;
    componentWillUnmount?(): void;
};
declare function propsObserver<P extends Record<string, any>, C extends Constructor<P>>(propsToWatch: Array<keyof P>): (Class: C) => C & Constructor<P>;
export default propsObserver;