/usr/ is in libfxscintilla-dev 2.11.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libfxscintilla-dev/
/usr/share/doc/libfxscintilla-dev/copyright
/usr/include/
/usr/include/fxscintilla/
/usr/include/fxscintilla/FXScintilla.h
/usr/include/fxscintilla/Platform.h
/usr/include/fxscintilla/KeyWords.h
/usr/include/fxscintilla/SciLexer.h
/usr/include/fxscintilla/ScintillaWidget.h
/usr/include/fxscintilla/Scintilla.h
/usr/include/fxscintilla/WindowAccessor.h
/usr/include/fxscintilla/PropSet.h
/usr/include/fxscintilla/Accessor.h
/usr/lib/
/usr/lib/pkgconfig/
/usr/lib/pkgconfig/fxscintilla.pc
/usr/share/doc/libfxscintilla-dev/README
/usr/share/doc/libfxscintilla-dev/changelog.Debian.gz