docs: protected void setBodyReadOnly() {
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.entry(this, tc, "setBodyReadOnly");
          bodyReadOnly = true;
          if (TraceComponent.isAnyTracingEnabled() && tc.isEntryEnabled())
              SibTr.exit(this, tc, "setBodyReadOnly");
      }