@Override
    protected Object processResponse(final @NotNull Message msg) throws Exception {
      processAck(msg, "txFailover");
      return null;
    }
Indicates to the server that a transaction is failing over to this server. The server then
performs the necessary bootstrapping for the tx.

@since GemFire 6.6
geode-core/src/main/java/org/apache/geode/cache/client/internal/TXFailoverOp.java