code: def _request(self, process=None, wait=None):
          
          opts = []
          if process is not None:
              opts.append('process=%s' % process)
          if wait is not None:
              if wait:
                  opts.append('wait=true')
              else:
                  opts.append('wait=false')
          return 'field()record[%s]' % (','.join(opts))
docs: helper for building pvRequests
  
          :param str process: Control remote processing.  May be 'true', 'false', 'passive', or None.
          :param bool wait: Wait for all server processing to complete.