export declare function repeat(n: number, fn: (...args: any[]) => void): void;
export declare function transform(x: number, fn: (...args: any[]) => any): number;
export declare function tryCatch(fn: (...args: any[]) => void): string;
export declare function describeError(fn: (...args: any[]) => void): string;
export declare function throwTypeError(): void;