make copyFrom strategies overrideable in the template/copy source, i.e. allow to explicitly override an existing field with null even if the behaviour is otherwise configured.
This requires some kind of meta-information to be retained after object generation.
After #309
make copyFrom strategies overrideable in the template/copy source, i.e. allow to explicitly override an existing field with null even if the behaviour is otherwise configured.
This requires some kind of meta-information to be retained after object generation.