docs: def unlock(self):
          """
          Unlock the IOS-XR device config.
  
          Use if Locking/Unlocking is not performaed automatically by lock=False
          """
          if self.locked:
              rpc_command = '<Unlock/>'
              try:
                  self._execute_rpc(rpc_command)
              except XMLCLIError:
                  raise UnlockError('Unable to unlock the config!', self)
              self.locked = False