- Rename variable
- Extract variable
- Extract constant
- Extract field (Java)
- Type migration
- Extract Component (React)
- Remove unused imports
- Remove unused arguments
- IntelliJ: https://www.jetbrains.com/help/idea/refactoring-source-code.html
- vim-ruby-refactoring: https://github.com/ecomba/vim-ruby-refactoring