On Fri, 28 May 2021 15:42:06 GMT, Jonathan Gibbons <j...@openjdk.org> wrote:

> This is questionable and probably wrong.
> 
> The use of the identity check was specifically to differentiate between a 
> sentinel value (EMPTY) and values which just happen to be empty.

The purpose of this change is to implement this same behavior with better 
naming and documentation, and without requiring the identity check.

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PR: https://git.openjdk.java.net/jdk/pull/4130

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