code: public static EmbeddableWebSphereTransactionManager getTransactionManager() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.entry(tc, "getTransactionManager");
  
          if (_tranManager == null) {
              loadEmbeddableTranManager(tmImplFactoryKey);
          }
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              Tr.exit(tc, "getTransactionManager", _tranManager);
          return (EmbeddableWebSphereTransactionManager) _tranManager;
      }
docs: This method returns the underlying implementation of the TransactionManager. Use of this object
  replaces use of the old JTSXA instance and static methods.