/**
* {inheritdoc}
*/
public function getNodeName(NodeInterface $node)
{
/* @var $node FieldInstanceNode */
$object = $node->getValue();
if (!empty($object['label'])) {
return (string) $object['label'];
}
$field = field_info_field($node->getFieldName());
if (isset($field['label'])) {
return $field['label'];
}
}