import type { ChartUnit } from '../types/chart-unit.js';
/**
 * As we introduced custom formatters in the charts, we need to fallback
 * to a default function in case it's not specified by the users.
 * @param unit - Optional. The unit to be used in this formatter
 * @param precision - Optional. The precision to be used in this formatter
 *
 * @returns a default formatter (a function callback)
 */
export declare function defaultUnitFormatter(unit?: ChartUnit, precision?: number): (value: number, unitOverride?: ChartUnit) => string;