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- Anonymous Inner Classes and Nested Static Classes
- Annotation enhancements
- Grape enhancements
- Power Asserts
- AST enhancements: AST Viewer and AST Builder
- Ability to customize the Groovy Truth
- Dependency upgrades
- Rewrite of GroovyScriptEngine
- GroovyConsole enhancements
- SQL batch updates and transactions
- More details: (draft) Groovy 1.7 release notes
New features and improvements in Groovy 1.6:
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