export declare class Assert { private name; private value; constructor(value: unknown, name: string); toBePresent(): Assert; toBeAbsent(): Assert; toBeAString(): Assert; toBeABoolean(): Assert; toBeANumber(): Assert; toBeADate(): Assert; toBeAFunction(): Assert; toBeAnArray(): Assert; toBeAnObject(): Assert; } export declare function assert(value: unknown, name?: string): Assert;