src/OptionParser.php
protected function pushOptionValue(Option $spec, $arg, $next)
    {
        if ($next && !$next->anyOfOptions($this->specs)) {
            $spec->pushValue($next->arg);
        }
    }
protected function pushOptionValue(Option $spec, $arg, $next)
    {
        if ($next && !$next->anyOfOptions($this->specs)) {
            $spec->pushValue($next->arg);
        }
    }
/*
push value to multipl value option