/**
  * @param DocumentInterface $document
  *
  * @return array
  */
 protected function fetchDocumentTemplateValues(DocumentInterface $document)
 {
     $relatedSection = $this->getRelatedSection();
     return array_merge(parent::fetchDocumentTemplateValues($document), ['relatedDocument' => $this->getDocumentRelation($document, $relatedSection)->first(), 'relatedSection' => $relatedSection, 'relatedField' => $this->getRelatedField()]);
 }