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https://issues.apache.org/jira/browse/LOG4J2-3448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17516166#comment-17516166
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Matt Sicker commented on LOG4J2-3448:
-------------------------------------
[https://checkerframework.org|https://checkerframework.org/] might be useful
here, especially if it supports custom annotations.
> Add nullability-related annotations for better documentation and static
> analysis
> --------------------------------------------------------------------------------
>
> Key: LOG4J2-3448
> URL: https://issues.apache.org/jira/browse/LOG4J2-3448
> Project: Log4j 2
> Issue Type: Improvement
> Components: API
> Reporter: Matt Sicker
> Priority: Major
>
> Nullability annotations can be used by static analysis tools, IDEs, and even
> Kotlin, to better check for potential NullPointerException errors or
> redundant null checks. To avoid introducing an additional dependency here,
> these annotations can be defined in the API. At minimum, some form of
> {{@Nonnull}} and {{@Nullable}} should be added.
> Alternatively, as these are compile-time annotations anyways, it may be
> possible to use a third-party annotation library here as long as it's also
> compile-time only.
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