glib:key-file-boolean (keyfile group key)

keyfile -- a g:key-file instance
group -- a string for the group name
key -- a string for the key

The boolean with the value associated with the key, or nil if the key was not found or could not be parsed.

The g:key-file-boolean function returns the value associated with key under group as a boolean. The (setf g:key-file-boolean) function associates a new boolean value with key under group. If key cannot be found then it is created.

If key cannot be found then nil is returned. Likewise, if the value associated with key cannot be interpreted as a boolean then nil.