/usr/share/doc/swig3.0/examples is in swig3.0-examples 3.0.8-0ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/swig3.0/../swig3.0-examples
/usr/share/doc/swig3.0/../swig3.0-examples