I have created a class to test this function. Just to save a .png picture to my local.
### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] Please describe what you did
- [x] Link to relevant issues in GitHub or Jira
- [x] Link to relevant pull requests, esp. upstream and downstream changes
- [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue
Problem caused by DataSetBuilder.build(). The rowKey which is an instance of TreeSet is sorted by natural ordering.
The values of rowKey seems not visible to end users, got a quick way to fix the issue by adding a prefix to each of them.
Issue#215
Testing done
I have created a class to test this function. Just to save a .png picture to my local.