anchor.diff:      }
   
       if (benchmarkingExperiment) {
  -      // TODO(sra): Set flags implied by '--benchmarking-x'. At this time we
  -      // use it to run the old-rti to continue comparing data with new-rti, but
  -      // we should remove it once we start benchmarking NNBD.
  -      useNewRti = false;
  +      // Set flags implied by '--benchmarking-x'.
  +      // TODO(sra): Use this for some NNBD variant.
       }
   
       if (_noLegacyJavaScript) legacyJavaScript = false;
  
positive.code:   bool experimentCallInstrumentation = false;
  
    /// Whether to use the new RTI representation (default).
    bool useNewRti = true;
  
    /// Whether null-safety (non-nullable types) are enabled in the sdk.
    ///
  
negative.code:       ..experimentToBoolean = _hasOption(options, Flags.experimentToBoolean)
        ..experimentCallInstrumentation =
            _hasOption(options, Flags.experimentCallInstrumentation)
        ..generateSourceMap = !_hasOption(options, Flags.noSourceMaps)
        ..outputUri = _extractUriOption(options, '--out=')
        ..platformBinaries = platformBinaries
  