(self)
Should return the model class of the backend (a subclass of SQLMobileBackend).
Should return the model class of the backend (a subclass of SQLMobileBackend).
Should return the model class of the backend ( a subclass of SQLMobileBackend ) .
def backend_class(self):
        """
        Should return the model class of the backend (a subclass of SQLMobileBackend).
        """
        raise NotImplementedError("Please implement this method")
def backend_class ( self ) : raise NotImplementedError ( "Please implement this method" )