code: public TransactionContext createTransactionContext() {
      transactionContext = dataFabricFacade.createTransactionManager();
      for (TransactionAware transactionAware : transactionAwares) {
        this.transactionContext.addTransactionAware(transactionAware);
      }
      return transactionContext;
    }
docs: Create a new {@link TransactionContext} for this flowlet. Add all {@link TransactionAware}s to the context.
  @return a new TransactionContext.