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lsst · Aug 19, 2024 · 13ac826 · 13ac826
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diff --git a/doc/changes/DM-45738.feature.rst b/doc/changes/DM-45738.feature.rst
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+* Added ``--collections`` option to ``butler query-dataset-types`` to allow the resultant dataset types to be constrained by those that are used by specific collections.
+* Changed the ``Butler.collections`` property to be a ``ButlerCollections`` instance.
+  This object can still act as a sequence equivalent to ``ButlerCollections.defaults`` but adds new APIs for querying and manipulating collections.
+  Any methods with names starting with ``x_`` are deemed to be an experimental API that may change in the future.
diff --git a/doc/changes/DM-45738.removal.rst b/doc/changes/DM-45738.removal.rst
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+The ``Butler.collection_chains`` property is now deprecated.
+Please use ``Butler.collections`` instead.