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https://issues.apache.org/jira/browse/LOG4J2-1645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15597221#comment-15597221
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Remko Popma commented on LOG4J2-1645:
-------------------------------------
Do we really need to add a new class for this? Can't we put a frozen
{{SortedArrayStringMap}} instance in a public shared constant somewhere,
perhaps in the factory class? That would increase the API surface by a minimal
amount.
> Immutable empty StringMap
> -------------------------
>
> Key: LOG4J2-1645
> URL: https://issues.apache.org/jira/browse/LOG4J2-1645
> Project: Log4j 2
> Issue Type: Improvement
> Affects Versions: 2.7
> Reporter: Mikael Ståldal
> Assignee: Mikael Ståldal
> Priority: Minor
>
> It would be useful for implementors of {{ContextDataInjector}} to have an
> immutable empty implementation of {{StringMap}}.
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