docs: void invalidateToStringCache() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "invalidateToStringCache");
  
          // Invalidate the toString cache.
          cachedToString = null;
  
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "invalidateToStringCache");
      }