/**
 * Utilities
 */
import { Dict, ColorRange } from './types';
import chroma, { Color } from 'chroma-js';
export declare function noop(...args: any[]): void;
export declare function devNoop(...args: any[]): void;
export declare function isEmpty(val: any): boolean;
export declare function capitalize(str: string): string;
export declare const get: (model: Dict, key?: string) => any;
export declare const set: (model: Dict, key: string, val: any) => void;
export declare function safeChroma(color: string | number | Color, fallback?: string | number | Color): chroma.Color;
export declare function chooseGoodTextColor(textColorAlternativesList: string[], backgroundColor: string): Color[];
export declare function isDarkColor(hexColorCode: string): boolean;
export declare function validateColorRange(colorRange: ColorRange): {
    value: number;
    color: string;
}[];
/**
 * Convert proportional segment sizes into cumulative break values for react-slider.
 * The final 100% marker is omitted when there are multiple segments (react-slider
 * only needs internal breakpoints). A single segment returns an empty array.
 */
export declare function toCumulativeBreaks(values: number[]): number[];
/**
 * Convert cumulative break values back into proportional segment sizes.
 * Appends the implicit 100% end marker before calculating differences.
 * Does not mutate the input array.
 */
export declare function fromCumulativeBreaks(values: number[]): number[];