SnapshotContributor (aws-advanced-jdbc-wrapper 4.4.0 API)

```
public interface SnapshotContributor
```
Implemented by stateful read/write splitting helpers that contribute a fragment to the plugin's diagnostic state snapshot. The unified plugin aggregates the fragments of all helpers that implement this interface alongside its own shared state.
Fragments should use distinct key names to avoid collisions when helpers are combined.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`java.util.List<Pair<java.lang.String,java.lang.Object>>`	`snapshotState()` Returns this helper's snapshot fragment as a list of key/value pairs.

Interface SnapshotContributor