Github user klopfdreh commented on the issue:
https://github.com/apache/wicket/pull/275
Following changes have been made:
* The init() method has been changed into gatherExtendedInfo() which is
only be executed if
org.apache.wicket.settings.RequestCycleSettings.setGatherExtendedBrowserInfo(boolean)
is set to true
* MetaDataKey has been used to initialize YAUAA
* All browser specific methods have been moved into detectBrowserProperties
* gatherExtendedInfo / detectBrowserProperties are protected / public so
that the user may override them
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