type NotifyOpenLayerObserverProps = {
    isOpen: boolean;
    onClose: () => void;
};
/**
 * Functional component wrapper around `useNotifyOpenLayerObserver`.
 *
 * This is needed as PopupSelect is a class component, which cannot use hooks directly.
 *
 * Even though the internal `Select` component (used internally by `PopupSelect`) also registers with
 * the OpenLayerObserver, we are also registering `PopupSelect` as well, to allow the observer to close
 * the `PopupSelect`'s outer popup.
 *
 * This will technically count as 2 open layers, however the specific count is not important - the main
 * concern is that the observer can know if there are _any_ open layers (0, or 1+), and how to close them.
 */
export declare function NotifyOpenLayerObserver({ isOpen, onClose }: NotifyOpenLayerObserverProps): null;
export {};