code: def create(self, unique_name=values.unset, data=values.unset):
          
          data = values.of({'UniqueName': unique_name, 'Data': serialize.object(data), })
  
          payload = self._version.create(
              'POST',
              self._uri,
              data=data,
          )
  
          return DocumentInstance(self._version, payload, service_sid=self._solution['service_sid'], )
docs: Create a new DocumentInstance
  
          :param unicode unique_name: The unique_name
          :param dict data: The data
  
          :returns: Newly created DocumentInstance
          :rtype: twilio.rest.preview.sync.service.document.DocumentInstance