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[ MyTestClass1(x=1), MyTestClass1(x=1, y=2, z=3), MyTestClass2(x=10), MyTestClass2(x=10, y=20, z=30), MyTestClass3(x=1), MyTestClass3(x=1, y=2, z=3), MyTestClass3(x=1, y=2, z=3), YAMLObject1(my_parameter='foo', my_another_parameter=[1,2,3]) ]