Atlas Search - Highlights for document field with dynamic mapping

Based on my tests, I’m pretty sure the answer is no, but I’m asking just in case: Is it possible to retrieve highlights for a field indexed as type document with dynamic mapping? This is the field definition for the index:

"properties": {
  "dynamic": true,
  "type": "document"
}

It’s indexed as dynamic, 'cause the attributes inside that properties object can vary depending on the document.