[skip ci]Add some comments in appendix_a_basic_components.md (#11356)

Signed-off-by: ruiyi.jiang <ruiyi.jiang@zilliz.com>
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ryjiang 2021-11-06 12:19:31 +08:00 committed by GitHub
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@ -421,6 +421,7 @@ type TxnKV interface {
###### A.7.3 MetaKv
```go
// MetaKv is TxnKV for meta data. It should save data with lease.
type MetaKv interface {
TxnKV
GetPath(key string) string