public function check() {
        $this->_errors = [];

        /** @var $element \Gcs\Framework\Core\Orm\Validation\Element\Element */
        foreach ($this->_elements as $element) {
            $element->check();

            if ($element->valid() == false) {
                $this->_errors = array_merge($this->_errors, $element->errors());
            }
        }
    }