declare type SvelteAction = (el: HTMLElement, params?: any) => {
    destroy?: () => void;
    update?: (parameters: any) => void;
};
export declare function watchChanges(actionFn: SvelteAction, params: MutationObserverInit): (el: HTMLElement, options?: any) => {
    update: ((parameters: any) => void) | undefined;
    destroy(): void;
};
export {};