docs: def list_notes(self, page=0, since=None):
          """
          Get the notes of current object
  
          :param page: the page starting at 0
          :type since: int
          :param since: get all notes since a datetime
          :type since: datetime.datetime
          :return: the notes
          :rtype: list
          """
          from highton.models.note import Note
          params = {'n': int(page) * self.NOTES_OFFSET}
          if since:
              params['since'] = since.strftime(self.COLLECTION_DATETIME)
  
          return fields.ListField(
              name=self.ENDPOINT,
              init_class=Note
          ).decode(
              self.element_from_string(
                  self._get_request(
                      endpoint=self.ENDPOINT + '/' + str(self.id) + '/' + Note.ENDPOINT,
                      params=params
                  ).text
              )
          )