export declare function range(...args: [number] | [number, number] | [number, number, number]): number[];
export declare class NumberRange {
    readonly start: number;
    readonly end: number;
    constructor(start: number, end: number);
    get length(): number;
    map<T>(fn: (i: number) => T): T[];
    forEach(fn: (i: number) => void): void;
    [Symbol.iterator](): Generator<number, void, unknown>;
    static equals(a: NumberRange | undefined, b: NumberRange | undefined): boolean;
    update(start: number, end: number): NumberRange;
    static empty: NumberRange;
    toString(): string;
    contains(n: number): boolean;
}