docs: def initAddons(cls, recurse=True):
          """
          Loads different addon modules for this class.  This method
          should not be overloaded in a subclass as it also manages the loaded
          state to avoid duplicate loads.  Instead, you can re-implement the
          _initAddons method for custom loading.
          
          :param      recurse | <bool>
          """
          key = '_{0}__addons_loaded'.format(cls.__name__)
          if getattr(cls, key, False):
              return
  
          cls._initAddons(recurse)
          setattr(cls, key, True)