(self)
return None
returns number of rows
returns number of rows
returns number of rows
def number_of_rows(self):
        """ returns number of rows
        """
        if self.model() is not None:
            return self.number_of_items()

        return None
def number_of_rows ( self ) : if self . model ( ) is not None : return self . number_of_items ( ) return None