code: def do_refresh(self, arg):
          
          if arg:
              raise CmdError("too many arguments")
          if self.cmdprefix:
              process = self.get_process_from_prefix()
              process.scan()
          else:
              self.debug.system.scan()
docs: refresh - refresh the list of running processes and threads
          [~process] refresh - refresh the list of running threads