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https://issues.apache.org/jira/browse/LANG-1704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17748815#comment-17748815
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Gary D. Gregory commented on LANG-1704:
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The API should stay as extensible, the use cases are:
- Allow typed subclasses, for example, MyCustomPair extends ImmutablePair<Foo,
Bar>
- Allow inline subclasses, for example, new ImmutablePair(foo, bar) \{ some
overrides \} (handy when writing tests).
I have use cases for both of these (at work).
> ImmutablePair and ImmutableTriple not actually final as documented
> ------------------------------------------------------------------
>
> Key: LANG-1704
> URL: https://issues.apache.org/jira/browse/LANG-1704
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.tuple.*
> Affects Versions: 3.13.0
> Reporter: Dan Ziemba
> Priority: Minor
>
> As of commons-lang3 3.13.0, the ImmutablePair and ImmutableTriple classes are
> no longer final, even though their javadocs claim that they are. This is a
> problem because you can now subclass those and, for example, make an
> effectively mutable object that could be passed to a method with a parameter
> of type ImmutablePair.
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