import { CategoricalChartTooltipVariant } from '../types/categorical-bar-chart.js';
/**
 * Returns true if tooltipVariant is a valid CategoricalChartTooltipVariant
 * @param tooltipVariant - tooltip variant
 */
export declare const isValidTooltipVariant: (tooltipVariant: "single" | "grouped") => tooltipVariant is CategoricalChartTooltipVariant;