public function setEnv($shortOptions = '', array $longOptions = array(), array $argv = array())
    {
        
        if (!empty($argv)) {
            $this->argv = $argv;
            $this->argc = count($argv);
        }
        
        $this->shortOptions = $shortOptions;
        $this->longOptions  = $longOptions;
        
        $this->program = $this->argv[0];
        
    }