func (w *Writer) NewBatch() store.KVBatch {
rv := Batch{
store: w.store,
merge: store.NewEmulatedMerge(w.store.mo),
batch: new(leveldb.Batch),
}
return &rv
}
func (b *Batch) Reset() {
b.batch.Reset()
b.merge = store.NewEmulatedMerge(b.store.mo)
}