code: def get_app(defs, add_help=True):
      
      def is_resource(d):
          try:
              if issubclass(d, wsgiservice.Resource) and hasattr(d, '_path'):
                  return True
          except TypeError:
              pass  # d wasn't a class
  
          return False
  
      resources = [d for d in defs.values() if is_resource(d)]
      if add_help:
          resources.append(wsgiservice.resource.Help)
      return Application(resources)
docs: Small wrapper function to returns an instance of :class:`Application`
      which serves the objects in the defs. Usually this is called with return
      value globals() from the module where the resources are defined. The
      returned WSGI application will serve all subclasses of
      :class:`wsgiservice.Resource` found in the dictionary.
  
      :param defs: Each :class:`wsgiservice.Resource` object found in the values
                   of this dictionary is used as application resource. The other
                   values are discarded.
      :type defs: dict
      :param add_help: Whether to add the Help resource which will expose the
                       documentation of this service at /_internal/help
      :type add_help: boolean
      :rtype: :class:`Application`