docs: public void setMessageDeletionMode(final String messageDeletionMode) {
  
          if (TraceComponent.isAnyTracingEnabled() && TRACE.isDebugEnabled()) {
              SibTr
                              .debug(this, TRACE, "MessageDeletionMode",
                                     messageDeletionMode);
          }
          _messageDeletionMode = messageDeletionMode;
  
      }