/usr/share/doc/mysql-workbench/examples is in mysql-workbench-data 6.3.8+dfsg-1build3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/mysql-workbench/../mysql-workbench-data/examples
/usr/share/doc/mysql-workbench/../mysql-workbench-data/examples