* result is applied to object properties (eg. '?' or 'stderr')
* @returns {Object} self.
*/
- public void run(unowned SpawnFinish? finished_cb) throws SpawnError, GLib.SpawnError, GLib.IOChannelError
+ public void run(unowned SpawnFinish finished_cb) throws SpawnError, GLib.SpawnError, GLib.IOChannelError
{