(self)
:return: the django model class belonging to this reindexer
:return: the django model class belonging to this reindexer
: return : the django model class belonging to this reindexer
def model_class(self):
        """
        :return: the django model class belonging to this reindexer
        """
        raise NotImplementedError
def model_class ( self ) : raise NotImplementedError