Install libglib2.0-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libglib2.0-doc
Description:
Documentation files for the GLib library
GLib is a library containing many useful C routines for things such as trees, hashes, lists, and strings. It is a useful general-purpose C library used by projects such as GTK+, GIMP, and GNOME. . This package contains the HTML documentation for the GLib library in /usr/share/doc/libglib2.0-doc/ .
Homepage: http://www.gtk.org/
Version: 2.56.1-2ubuntu1
Section: doc