code: def handler(event, context):
      """Main lambda handler use as the entry point
  
      Args:
          event (dict): Event object that can potentially contain details on what to
              during this invocation. An example of this is the 'invocation_type' key
              that is used as an override to allow for successive invocations (and in
              the future, support for historical invocations)
          context (LambdaContxt): AWS LambdaContext object
      """
      StreamAlertApp.get_app(event["app_type"])(event, context).gather()
  
label_desc: Use image node_id 1 for calling a global function with example usage: handler(event, context) without return types