anchor.diff:  
   class InfluencesChecker {
     final List<Iterator<int>> jointsIterators;
  -  final List<Iterator<num>> weightsIterators;
  +  final List<Iterator<double>> weightsIterators;
     final int maxJointIndex;
     final int limitingSkinIndex;
     final String path;
  
positive.code:       }
        _currentIndices.clear();
        _componentIndex = 0;
        _sum = 0;
      }
      _index++;
  
negative.code:     }
  
      if (4 == ++_componentIndex) {
        if ((_sum - 1.0).abs() > _threshold) {
          for (var i = 0; i < jointsIterators.length; i++) {
            context.addIssue(DataError.accessorWeightsNonNormalized,
                name: '$path/${WEIGHTS_}_$i', args: [_index - 3, _index, _sum]);
  