/**
  * Override constructor to temporarily wait with defining rules.
  */
 public function __construct()
 {
     parent::__construct();
     // we always offer a configuration option
     $this->addOption('c|config', '-s', 'Configuration filename OR "none", when this option is omitted DocBlox tries to load the docblox.xml or ' . 'docblox.dist.xml from the current working directory');
 }