public void addTransaction(SIPServerTransaction serverTransaction) throws IOException {
  if (isLoggingEnabled())   stackLogger.logDebug("added transaction " + serverTransaction);
  serverTransaction.map();
  addTransactionHash(serverTransaction);
}

public void addTransaction ( SIPServerTransaction serverTransaction ) throws IOException { if ( isLoggingEnabled ( ) ) stackLogger . logDebug ( "added transaction " + serverTransaction ) ; serverTransaction . map ( ) ; addTransactionHash ( serverTransaction ) ; }
add a new server transaction to the set of existing transactions . add it to the top of the list so an incoming ack has less work to do in order to find the transaction .
