code: public ClientTransactionWrapper getNewDialogActivityClientTransaction(
  			DialogWrapper dialogWrapper, Request request)
  			throws TransactionUnavailableException {
  		final SIPClientTransaction ct = (SIPClientTransaction) provider.getNewClientTransaction(request);
  		final ClientTransactionWrapper ctw = new ClientTransactionWrapper(ct,
  				ra);
  		dialogWrapper.addOngoingTransaction(ctw);
  		return ctw;
  	}
docs: Creates a new {@link ClientTransactionWrapper} bound to a
  {@link DialogWrapper}, which is not an activity in SLEE.
  
  @param dialogWrapper
  @param request
  @return
  @throws TransactionUnavailableException