Inside the clientappservices folder, create a file named helpers.global.ts and update it as follows:

// SNIPP SNIPP
export const HELPER = {
getFileSize: function(bytes: number, decimals ? : number): string {
             if (bytes == 0) return '0 Bytes';
             var k = 1024,
                     dm = decimals || 2,
                     sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
                     i = Math.floor(Math.log(bytes) / Math.log(k));
             return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
     }
}
// SNIPP SNIPP

As of now, we have one helper method, which converts bytes to human readable file sizes. Next, update clientappservicesglobal.constants.ts and add the following:

// SNIPP SNIPP
export const GLOBAL = {
        // SNIPP
        allowedImageExt: ['jpg', 'jpeg', 'gif', 'bmp', 'png']
}
// SNIPP SNIPP

That is it; these are all the changes needed to test out our Vision API integration with SmartExchange.