export declare type GcImageViewerException = {
    message: string;
    name: string | 'PasswordException' | 'UnknownErrorException' | 'InvalidImageException' | 'MissingImageException' | 'UnexpectedResponseException' | 'FormatError' | 'AbortException';
};
export declare function ensureException(ex: string | GcImageViewerException, in17n?: any): GcImageViewerException;