/usr/share/doc/gtkmm-3.0

This file is indexed.

/usr/share/doc/gtkmm-3.0 is in libgtkmm-3.0-doc 3.10.1-0ubuntu2.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/share/doc/libgtkmm-3.0-doc