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For examples of extensions using this hook, see Category:BSUserInfoMetaDataFactoryCallback extensions . Category:Extension hooks#BSUserInfoMetaDataFactoryCallback Category:Undocumented extension hooks#BSUserInfoMetaDataFactoryCallback Category:Extension hooks provided by BlueSpiceUserInfo Category:Extension hooks#BSUserInfoMetaDataFactoryCallback Category:Undocumented extension hooks#BSUserInfoMetaDataFactoryCallback Category:Extension hooks provided by BlueSpiceUserInfo