public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
		{
			var custom = value as ICustomJson;
			if (custom == null)
				return;

			var json = custom.GetCustomJson();
			var rawJson = json as RawJson;
			if (rawJson != null)
				writer.WriteRawValue(rawJson.Data);
			else 
				serializer.Serialize(writer, json);
		}