public static GradientWrapper GetBackgroundLayerGradient(this Rule rule, CustomizationService customizationService)
        {
            var gradientKey = rule.Evaluate <string>("background_gradient");

            return(customizationService.GetGradient(gradientKey));
        }
        public static GradientWrapper GetPedestrianLayerGradient(this Rule rule, CustomizationService customizationService)
        {
            var gradientKey = rule.Evaluate <string>("pedestrian_gradient");

            return(customizationService.GetGradient(gradientKey));
        }