docs: def timeframe(self, start, end):
          r"""
              When you want to search bugs for a certain time frame.
  
              :param start:
              :param end:
              :returns: :class:`Search`
          """
          if start:
              self._time_frame['chfieldfrom'] = start
          if end:
              self._time_frame['chfieldto'] = end
          return self