@Nullable
    @Override
    DfaProblemType tryMerge(DfaProblemType other) {
      if (other instanceof RangeDfaProblemType rangeProblem &&
          myTemplate.equals(rangeProblem.myTemplate) &&
          Objects.equals(myType, rangeProblem.myType)) {
        return new RangeDfaProblemType(myTemplate, myRangeSet.join(rangeProblem.myRangeSet), myType);
      }
      return super.tryMerge(other);
    }
@Nullable
    @Override
    DfaProblemType tryMerge(DfaProblemType other)