public static void FromFabrik(this ImageUrlBuilder builder, ViewHelperConfiguration configuration)
        {
            builder.AddModifier(src => TransformUri(src, configuration.StorageServerUri, configuration.MediaServerUri));

            if (configuration.Version.IsNotNullOrEmpty())
            {
                builder.SetParameter("v", configuration.Version);
            }
        }
 /// <summary>
 /// Initializes a new instance of <see cref="FabrikViewHelper"/>.
 /// </summary>
 public FabrikViewHelper(RequestContext requestContext, RouteCollection routeCollection, ViewHelperConfiguration configuration = null)
 {
     this.url           = new UrlHelper(requestContext, routeCollection);
     this.configuration = configuration ?? ViewHelperConfiguration.Configuration;
 }