code: void closeConnections()
      {
          final String methodName = "closeConnections";
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled())
          {
              SibTr.entry(this, TRACE, methodName);
          }
  
          synchronized (_connections)
          {
              Collection<SibRaMessagingEngineConnection> cons = _connections.values();
              Iterator<SibRaMessagingEngineConnection> iter = cons.iterator();
              while (iter.hasNext())
              {
                  SibRaMessagingEngineConnection connection = iter.next();
                  connection.close();
              }
              _connections.clear();
          }
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isEntryEnabled())
          {
              SibTr.exit(TRACE, methodName);
          }
      }
docs: Close all the connections we currently have open.