docs: def create(self):
      """
      Creates a folder in Exchange. ::
  
        calendar = service.folder().new_folder(
          display_name=u"New Folder Name",
          folder_type="CalendarFolder",
          parent_id='calendar',
        )
        calendar.create()
      """
  
      self.validate()
      body = soap_request.new_folder(self)
  
      response_xml = self.service.send(body)
      self._id, self._change_key = self._parse_id_and_change_key_from_response(response_xml)
  
      return self