
$cs = {
'/apps/someapp/some_int_key' => { type => 'int', value => 42 },
'/apps/someapp/some_string_key' => { type => 'string', value => 'hi' },
};
$reverse_cs = $client->reverse_change_set($cs);
$client->commit_change_set($cs, FALSE);

A GConfChangeSet allows you to collect a set of changes to configuration keys (set/unset operations). You can then commit all the changes at once.
In C, GConfChangeSet is an hash containing keys and GConfValues to be committed in a single pass (though not yet with an atomic operation). Since perl has hashes as a built-in type, GConfChangeSet is threated as an hash with the GConf keys as keys, and their relative Gnome2::GConf::Value as payload.

Gnome2::GConf(3pm), Gnome2::GConf::Value(3pm).