declare global {
    interface String {
        and: (_description: string) => string;
        on: (_situation: string) => string;
        sample: (_data: unknown) => string;
        samples: (_data: unknown) => string;
        with: (_options: Record<string, unknown>) => string;
    }
}
declare const throws: (value: unknown) => string;
declare const returns: (value?: unknown) => string;

export { returns, throws };