- [ ] `async` / `await` / `defer` - [x] AST transforms on loops - [ ] compound operator overlaods - [ ] grape system class loader - [ ] intersection type cast ([GROOVY-11998](https://issues.apache.org/jira/browse/GROOVY-11998)) - [ ] maven resolver for grapes - [ ] module imports - [ ] multi-assignment new forms - [x] `val`
async/await/deferval