RFR: 8285295: Need better testing for IdentityHashMap [v4]

[ExE Boss]

On Fri, 6 May 2022 06:39:59 GMT, XenoAmess <duke at openjdk.java.net> wrote:

> > It would be nice if such a test could be written, but as it stands I think that `Wrappers.java` test is too simplistic.
> 
> Would adding `Wrappers.java` a method-name white-list mechanism suitable in this situation?

It should really be a method name and type whitelist.

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PR: https://git.openjdk.java.net/jdk/pull/8354