import { RefObject } from 'react';
export declare function useScrollMask({ opened, scrollWrapperRef, calendarRef, }: {
    opened: boolean;
    calendarRef: RefObject<HTMLElement>;
    scrollWrapperRef: RefObject<HTMLElement>;
}): {
    mask: {
        topMask: number;
        bottomMask: number;
    };
    maskPosition: {
        top: number;
        bottom: number;
    };
    handleScroll: import("lodash").DebouncedFuncLeading<() => void>;
};