            });
            },
            download(index) {
                var file_info = this.result_file[index]
                if(!file_info) return;
                var byteCharacters = window.atob(file_info.data)
                var byteNumbers = new Array(byteCharacters.length)
                for (var i = 0; i < byteCharacters.length; i++) {
                    byteNumbers[i] = byteCharacters.charCodeAt(i)
                }
                var byteArray = new Uint8Array(byteNumbers)
   