/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/ is in libgluegen2-doc 2.1.5-1ubuntu1.
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/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/Lock.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/LockFactory.ImplType.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/LockFactory.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/RecursiveLock.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/RecursiveThreadGroupLock.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/SingletonInstance.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/ThreadLock.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/package-frame.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/package-summary.html
/usr/share/doc/libgluegen2-java/com/jogamp/common/util/locks/package-tree.html