Phactory\Mongo\Blueprint::_evalSequence PHP Method

    protected function _evalSequence(&$data)
    {
        $n = $this->_sequence->next();
        array_walk_recursive($data, function (&$value) use($n) {
            if (is_string($value) && false !== strpos($value, '$')) {
                $value = eval('return "' . stripslashes($value) . '";');
            }
        });
    }