import type { FormatterWithPrecision, TimeFrameFormatter } from '../../../../../core/types/formatter.js';
import type { XYAccessorDataTypes } from '../../../../types/xy-chart.js';
export declare function useRectSeriesTooltipHeaderContent(v0: XYAccessorDataTypes, v1?: XYAccessorDataTypes, formatter?: FormatterWithPrecision | TimeFrameFormatter): {
    duration: string | undefined;
    text: string;
};