import { ExtendedEChartsOption } from '../../types/echarts';
import { TooltipFormatter } from '../types';
import { CallbackDataParams } from 'echarts/types/dist/shared';

/**
 * Theme River Chart Tooltip Formatter
 */
export declare class ThemeRiverChartTooltipFormatter implements TooltipFormatter {
    format(isDark: boolean, chartOptions: ExtendedEChartsOption): (params: CallbackDataParams) => string;
    detailFormat(isDark: boolean, chartOptions: ExtendedEChartsOption): (params: CallbackDataParams) => string;
}
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