Install libhud-client2-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libhud-client2-doc
Description:
private library for implementing a HUD frontend
Interface for querying the HUD and getting results. . This package contains developer documentation.
Homepage: http://launchpad.net/hud
Version: 14.10+17.10.20170619-0ubuntu2
Section: universe/doc