export declare class AssertionResult {
    readonly passed: boolean;
    readonly message: string;
    readonly isOptional: boolean;
    readonly details: string | null;
    static failOptional(message: string, details?: string): AssertionResult;
    static fail(message: string, details?: string): AssertionResult;
    static pass(message: string): AssertionResult;
    private constructor();
}