if (log.isTraceEnabled()){ log.trace(this + " acknowledging non transactionally " + d); }
if (trace){ log.trace(this + " acknowledging non transactionally " + d); }
   private void acknowledgeNoTx(Delivery d)   {      checkClosed();      if (log.isTraceEnabled()){ log.trace(this + " acknowledging non transactionally " + d); }      try      {         //We remove the delivery from the state         state.acknowledge(d);                  if (log.isTraceEnabled()) { log.trace(this + " delivery " + d + " completed and forgotten"); }               }      catch(Throwable t)      {         // a non transactional remove shouldn't throw any transaction         log.error(this + " failed to remove delivery", t);      }   }