export type Range = {
    start: number;
    end: number;
};
export declare namespace Range {
    type Value = number | Range;
    function is(value: Value | undefined): value is Range;
    function clamp(value: number, min: number, max: number): number;
    function round(value: number, step: number | undefined): number;
    function setPart(current: Range, part: "start" | "end", value: number, min: number, max: number): Range;
    function normalize(value: Value | undefined, step: number | undefined): Value | undefined;
    function equals(a: Value | undefined, b: Value | undefined): boolean;
    function defined(value: Value | undefined): boolean;
    function percent(value: number, min: number, max: number): number;
}