import type { DataTableV2CellFormatter } from '../../../../tables/DataTableV2/features/CellFormatter.js';
import type { GanttSegmentData } from '../../types/gantt-chart.js';
export declare const GanttChartTooltipHeader: ({ segment, isDate, formatter, }: {
    segment: Pick<GanttSegmentData, "start" | "end">;
    isDate: boolean;
    formatter?: DataTableV2CellFormatter;
}) => import("react/jsx-runtime.js").JSX.Element;