[sealed] Sealed local classes?

Brian Goetz brian.goetz at oracle.com
Wed Oct 9 21:35:48 UTC 2019

> Proposal: ban `sealed` and `non-sealed` modifiers on _local_ classes 
> and interfaces.

And we would want to extend the ban we have for the other two forms of 
"subclasses inside implementations", lambdas and inner classes, to local 

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