/**
* Validate data
*
* @param \Magento\Sales\Model\Order\Shipment\Comment $comment
* @return array
*/
public function validate(Comment $comment)
{
$errors = [];
$commentData = $comment->getData();
foreach ($this->required as $code => $label) {
if (!$comment->hasData($code)) {
$errors[$code] = sprintf('%s is a required field', $label);
} elseif (empty($commentData[$code])) {
$errors[$code] = sprintf('%s can not be empty', $label);
}
}
return $errors;
}