Fix static check warnings in `ChangeStreamDocument`
@@ -421,6 +421,7 @@ public final class ChangeStreamDocument<TDocument> {
/**
* The wall time of the server at the moment the change occurred.
*
+ * @return The wall time of the server at the moment the change occurred.
* @since 4.7
* @mongodb.server.release 6.0
*/
@@ -432,6 +433,7 @@ public final class ChangeStreamDocument<TDocument> {
/**
* Any extra elements that are part of the change stream document but not otherwise mapped to fields.
*
+ * @return Any extra elements that are part of the change stream document but not otherwise mapped to fields.
* @since 4.7
*/
@Nullable
