code: def end_segment(self, end_time=None):
          
          self.context.end_segment(end_time)
          segment = self.current_segment()
          if segment and segment.ready_to_send():
              self._send_segment()
docs: End the current segment and send it to X-Ray daemon
          if it is ready to send. Ready means segment and
          all its subsegments are closed.
  
          :param float end_time: segment compeletion in unix epoch in seconds.