1. Edit code
   1. forward to load_all()
   2. forward to test()
2. load_all()
   1. forward to Run code
3. Run code
   1. back to Edit code
4. Edit tests
   1. forward to test()
5. test()
   1. forward to check()
   2. back to Edit tests
   3. back to Edit code
6. Edit roxygen
   1. forward to document()
7. document()
   1. forward to check()
   2. forward to "?fun"
8. ?fun
   1. back to Edit roxygen
9. check()
   1. forward to git commit & git push
10. git commit
11. git push