gtk-option-group (default)

default -- a boolean whether to open the default display when parsing the command line arguments

A g-option-group instance for the command line arguments recognized by GTK.

Returns an option group for the command line arguments recognized by GTK and GDK.

You should add this group to your g-option-context instance with the function g-option-context-add-group, if you are using the function g-option-context-parse to parse your command line arguments.