export declare function invariant<T>(message: string): (condition: T | null) => T;
export declare function invariant<T>(message: string, condition: T | null): T;
export declare function ensure<T>(message: string): (ensurable: T, condition: any) => T;
export declare function ensure<T>(message: string, ensurable: T): (condition: any) => T;
export declare function ensure<T>(message: string, ensurable: T, condition: any): T;