Read value at `offset`, of `key`. Because the internal SlimTrie does not store complete info of a key(to reduce memory consumption). Thus the offset SlimTrie returns might not be correct for an abscent record. It is data providers' responsibility to check if the record at `offset` has the exact `key
(offset int64, key string)
| 26 | // It is data providers' responsibility to check if the record at `offset` |
| 27 | // has the exact `key`. |
| 28 | Read(offset int64, key string) (string, bool) |
| 29 | } |
| 30 | |
| 31 | // OffsetIndexItem defines data types for a offset-based index, such as an index |