code: def get_document(
              self,
              collection_id, ref=None, mimetype="application/tei+xml, application/xml"):
          
          parameters = {
              "id": collection_id
          }
          _parse_ref_parameters(parameters, ref)
  
          return self.call(
              "documents",
              parameters,
              mimetype=mimetype
          )
docs: Make a navigation request on the DTS API
  
          :param collection_id: Id of the collection
          :param ref: If ref is a tuple, it is treated as a range. String or int are treated as single ref
          :param mimetype: Media type to request
          :return: Response
          :rtype: requests.Response