class_docstr: Class to be used as a decorator to register all AppIntegration subclasses
code: def __new__(cls, app):
      StreamAlertApp._apps[app.type()] = app
      return app
  
file_path: streamalert/streamalert/apps/__init__.py
imports: import importlib
  import logging
  import os
  from streamalert.apps.exceptions import AppException
label_desc: Use image node_id 1 for calling the StreamAlertApp obj's underlying member method code with example usage: obj.__new__(cls, app) and returns: app