We can't merge anything on Wikibase right now: https://integration.wikimedia.org/ci/job/mwext-php72-phan-docker/59/console (https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Wikibase/+/517690)
<checkstyle version="6.5"> 11:02:58 <file name="data-access/src/GenericServices.php"> 11:02:58 <error line="171" severity="warning" message="Reference to deprecated property \Wikibase\DataModel\SerializerFactory::OPTION_SERIALIZE_MAIN_SNAKS_WITHOUT_HASH defined at ../../vendor/wikibase/data-model-serialization/src/SerializerFactory.php:43" source="PhanDeprecatedClassConstant"/> 11:02:58 <error line="172" severity="warning" message="Reference to deprecated property \Wikibase\DataModel\SerializerFactory::OPTION_SERIALIZE_REFERENCE_SNAKS_WITHOUT_HASH defined at ../../vendor/wikibase/data-model-serialization/src/SerializerFactory.php:53" source="PhanDeprecatedClassConstant"/> 11:02:58 </file> 11:02:58 </checkstyle>