/// <reference types="react" />
import { GroupedData } from '../data-table.types';
interface UseStickyGroupAnchorParams<TData> {
    enabled: boolean;
    groupHeaderList: {
        index: number;
        start: number;
        data: GroupedData<TData>;
    }[];
    scrollContainerRef: React.RefObject<HTMLDivElement | null>;
}
interface UseStickyGroupAnchorResult<TData> {
    stickyGroup: GroupedData<TData> | null;
    stickyGroupIndex: number | null;
    recompute: () => void;
}
/**
 * Tracks the active group for the virtualized sticky group anchor.
 *
 * Picks the latest group whose `start` offset has been scrolled past, so the
 * anchor's content stays in sync with the natural section header underneath.
 *
 * Returns the current group's data plus the row index of its natural section
 * header — the consumer hides that row in the virtualized body so the natural
 * header doesn't visually slide past the anchor (matching the non-virtualized
 * table where CSS sticky pins each section header at the offset).
 *
 * `start` is supplied by the caller (computed from row sizes) rather than read
 * from the virtualizer's measurements cache, so it stays correct across data
 * loads even before the virtualizer has measured shifted rows.
 */
export declare function useStickyGroupAnchor<TData>({ enabled, groupHeaderList, scrollContainerRef }: UseStickyGroupAnchorParams<TData>): UseStickyGroupAnchorResult<TData>;
export {};
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