code: func (l *Ledis) newBatch(wb *store.WriteBatch, locker sync.Locker) *batch {
  	b := new(batch)
  	b.l = l
  	b.WriteBatch = wb
  
  	b.Locker = locker
  
  	return b
  }
docs: // type txBatchLocker struct {
  // }
  // func (l *txBatchLocker) Lock()   {}
  // func (l *txBatchLocker) Unlock() {}
  // type multiBatchLocker struct {
  // }
  // func (l *multiBatchLocker) Lock()   {}
  // func (l *multiBatchLocker) Unlock() {}