import { CustomColorPalette, ColorPalette } from '../../core/types/color-palette.js';
import { InternalSliceData } from '../types/internal/pie-chart.js';
import { SliceUnit, SliceData, GroupConfig } from '../types/pie-chart.config.js';
/**
 * Group the data depending on which threshold the user has selected
 * @param data - Data received from the dataSet
 * @param grouping - Received grouping config
 * @param colorPalette - Palette to apply to the slices.
 * @param unit - Unit of the data.
 */
export declare function buildGroupThreshold(data: SliceData[], grouping?: GroupConfig, colorPalette?: ColorPalette | CustomColorPalette, unit?: SliceUnit): InternalSliceData[];