How to use the aioimaplib.aioimaplib.CommandTimeout function in aioimaplib

if self.pending_sync_command is not None:
            yield from self.pending_sync_command.wait()

        if Commands.get(command.name).exec == Exec.is_sync:
            if self.pending_async_commands:
                yield from self.wait_async_pending_commands()
            self.pending_sync_command = command
        else:
            if self.pending_async_commands.get(command.untagged_resp_name) is not None:
                yield from self.pending_async_commands[command.untagged_resp_name].wait()
            self.pending_async_commands[command.untagged_resp_name] = command

        self.send(str(command))
        try:
            yield from command.wait()
        except CommandTimeout:
            if Commands.get(command.name).exec == Exec.is_sync:
                self.pending_sync_command = None
            else:
                self.pending_async_commands.pop(command.untagged_resp_name, None)
            raise

        return command.response

def _timeout_callback(self):
        self._exception = CommandTimeout(self)
        self.close(str(self._exception), 'KO')