@Override
      public void snapshotEntry(SnapshotRecord entry) throws IOException {
        out.writeSnapshotEntry(entry);
      }
Creates a snapshot file and provides a serializer to write entries to the snapshot.

@param snapshot the snapshot file
@param region the region name
@return the callback to allow the invoker to provide the snapshot entries
@throws IOException error writing the snapshot file
geode-core/src/main/java/org/apache/geode/internal/cache/snapshot/GFSnapshot.java