- Fix nasty bug when using with :doc:`sqlalchemy <sqlalchemy:index>` where related objects could get added to the session even though they were never requested, as a result of a backref on a third model.
2.0.0
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- Backwards incompatible change to split the concern for sample object identity out into :class:`chide.Set` and :class:`chide.sqlalchemy.Set` to avoid module-level :class:`~chide.Collection` instances resulting in cross-test pollution.