# Feature tests for optional const and optional new This directory was created in order to hold tests pertaining to the Dart feature that allows the `new` and `const` keywords on instance creation expressions and composite literals (maps and lists) to be omitted. For more details, please check the feature specifications on [optional const](https://github.com/dart-lang/sdk/blob/master/docs/language/informal/optional-const.md) and on [optional new](https://github.com/dart-lang/sdk/blob/master/docs/language/informal/optional-new.md).