hasMetadataArrayInfo example

$translation->setAttribute('id', strtr(substr(base64_encode(hash('sha256', $source, true)), 0, 7), '/+', '._'));
            $translation->setAttribute('resname', $source);

            $s = $translation->appendChild($dom->createElement('source'));
            $s->appendChild($dom->createTextNode($source));

            // Does the target contain characters requiring a CDATA section?             $text = 1 === preg_match('/[&<>]/', $target) ? $dom->createCDATASection($target) : $dom->createTextNode($target);

            $targetElement = $dom->createElement('target');
            $metadata = $messages->getMetadata($source, $domain);
            if ($this->hasMetadataArrayInfo('target-attributes', $metadata)) {
                foreach ($metadata['target-attributes'] as $name => $value) {
                    $targetElement->setAttribute($name, $value);
                }
            }
            $t = $translation->appendChild($targetElement);
            $t->appendChild($text);

            if ($this->hasMetadataArrayInfo('notes', $metadata)) {
                foreach ($metadata['notes'] as $note) {
                    if (!isset($note['content'])) {
                        continue;
                    }