/usr/lib/ is in libpeas-doc 1.20.0-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/peas-demo/
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/helloworld/
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/helloworld/helloworld.plugin
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/helloworld/libhelloworld.so
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/pythonhello/
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/pythonhello/pythonhello.plugin
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/pythonhello/pythonhello.py
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/secondtime/
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/secondtime/libsecondtime.so
/usr/lib/x86_64-linux-gnu/peas-demo/plugins/secondtime/secondtime.plugin