code: public static EsriFeatureClass FeatureClassFromJson(InputStream jsonInputStream) throws JsonParseException, IOException{
  		JsonParser parser = jsonFactory.createJsonParser(jsonInputStream);
  		return FeatureClassFromJson(parser);
  	}
docs: Construct an {@link com.esri.json.EsriFeatureClass} from JSON
  
  @param jsonInputStream JSON input stream
  @return EsriFeatureClass instance that describes the fully parsed JSON representation
  @throws JsonParseException
  @throws IOException