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https://issues.apache.org/jira/browse/COLLECTIONS-572?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Neidhart resolved COLLECTIONS-572.
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Resolution: Fixed
Added in r1686948.
> Create real set operations for SetUtils
> ---------------------------------------
>
> Key: COLLECTIONS-572
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-572
> Project: Commons Collections
> Issue Type: Sub-task
> Components: Collection, List
> Affects Versions: 4.0
> Reporter: Thomas Neidhart
> Fix For: 4.1
>
>
> The SetUtils should have cardinality operations that have the same definition
> as the typical mathematical set operations.
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