protected function compileValues(array $values, $prefix = '')
    {
        $retVal = [];
        foreach ($values as $key => $value) {
            if (is_array($value)) {
                $retVal = array_merge($retVal, $this->compileValues($value, $prefix . $key . '.'));
            } else {
                $retVal['{{' . $prefix . $key . '}}'] = $value;
            }
        }
        return $retVal;
    }