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diff --git a/oslo_versionedobjects/fields.py b/oslo_versionedobjects/fields.py
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diff --git a/oslo_versionedobjects/tests/test_fields.py b/oslo_versionedobjects/tests/test_fields.py
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diff --git a/oslo_versionedobjects/tests/test_objects.py b/oslo_versionedobjects/tests/test_objects.py
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