Adldap\Models\Model::convertStringToBool PHP Method

    protected function convertStringToBool($bool)
    {
        $bool = strtoupper($bool);
        if ($bool === strtoupper($this->schema->false())) {
            return false;
        } elseif ($bool === strtoupper($this->schema->true())) {
            return true;
        } else {
            return;
        }
    }