@SuppressWarnings({"rawtypes", "serial"})
  private SerializableCallable getDM() {
    return new SerializableCallable("getDM") {
      @Override
      public Object call() {
        return basicGetCache().getMyId();
      }
    };
  }
This method executes a transaction with operation on a key in a moved bucket, and expects
transaction to fail with TransactionDataRebalancedException.

@param op which entry op to be executed
@param bucketRedundancy redundancy for the colocated PRs
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRTransactionDUnitTest.java