ArcGISRuntimeXamarin.CategoriesActivity.CreateSampleModel C# (CSharp) Метод

        public SampleModel CreateSampleModel(byte[] jsonInBytes)
        {
            var serializer = new DataContractJsonSerializer(typeof(SampleModel));
            SampleModel sampleModel = null;

            using (Stream stream = Assets.Open("groups.json"))
            {
                using (MemoryStream ms = new MemoryStream(jsonInBytes))
                {
                    sampleModel = serializer.ReadObject(stream) as SampleModel;
                    //  sampleModel.SampleFolder = metadataFile.Directory;
                }
            }
            return sampleModel;
        }