def test_rebuild(self):
        self.mkbundle('in1', 'in2', output='out').build()
        assert self.get('out') == 'A\nB'
        self.mkbundle('in1', 'in2', output='out').build()
        assert self.get('out') == 'A\nB'
Here we check for multifield specific stuff like the instance
dataset/ETHPy150Open miracle2k/webassets/tests/test_bundle_build.py/TestBuildVarious.test_rebuild--crossover with--dataset/ETHPy150Open lsbardel/python-stdnet/tests/all/multifields/struct.py/MultiFieldMixin.test_multi_field_meta