@beenotung/tslib/strict-type.d.ts

utils library in Typescript

export declare function ensureDefined<A>(a: A): A;
/**
 * inclusively
 * */
export declare function ensureNumberInRange(a: number | string, lower: number, higher: number): number;
export declare function ensureString<S extends string>(s: S): S;
export declare function ensureNumber<Num extends number>(x: Num): Num;