/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/ is in libflexdock-java-doc 1.2.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/DockingEvent.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/DockingEventHandler.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/DockingListener.Stub.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/DockingListener.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/DockingMonitor.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/TabbedDragListener.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/DockingPortTracker.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/RootDockingPortInfo.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/package-frame.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/package-summary.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/hierarchy/package-tree.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/package-frame.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/package-summary.html
/usr/share/doc/libflexdock-java-doc/api/org/flexdock/docking/event/package-tree.html