docs: public long getAlterationTime() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(tc, "getAlterationTime", this._alterationTime);
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled()) {
              Long l = new Long(_alterationTime);
              SibTr.exit(tc, "getAlterationTime", l.toString());
          }
          return _alterationTime;
      }