/usr/share/lintian/overrides/libxfce4ui-1-0 is in libxfce4ui-1-0 4.12.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # libxfce4kbd-private-2 is private to Xfce core
libxfce4ui-1-0: shlib-missing-in-symbols-control-file libxfce4kbd-private-2 0 for usr/lib/x86_64-linux-gnu/libxfce4kbd-private-2.so.0.0.0
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