def test_type(self):
        rset = event.ResultSet()
        with pytest.raises(NotImplementedError):
            rset.extend([])
        with pytest.raises(NotImplementedError):
            rset.extend(False)
def draw_path(self,c,container):
		c.path(self.center[0],self.center[1],container.center[0],container.center[1])