code: def handle(self, cycle_delay=0.1):
          
          if self._server is not None:
              self._server.process(cycle_delay)
              self._driver.process_pv_updates()
docs: Call this method to spend about ``cycle_delay`` seconds processing
          requests in the pcaspy server. Under load, for example when running ``caget`` at a
          high frequency, the actual time spent in the method may be much shorter. This effect
          is not corrected for.
  
          :param cycle_delay: Approximate time to be spent processing requests in pcaspy server.