code: protected void retrieveBundleContext() {
  
          BundleContext bc = TxBundleTools.getBundleContext();
          if (tc.isDebugEnabled())
              Tr.debug(tc, "retrieveBundleContext, bc " + bc);
          _bc = bc;
      }
docs: This method retrieves bundle context. There is a requirement to lookup the DS Services Registry during recovery.
  Any bundle context will do for the lookup - this method is overridden in the ws.tx.embeddable bundle so that if that
  bundle has started before the tx.jta bundle, then we are still able to access the Service Registry.
  
  @return