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https://issues.apache.org/jira/browse/PIVOT-611?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12902830#action_12902830
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Greg Brown commented on PIVOT-611:
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I don't see any harm in adding this method, but I am curious about your use
case. Under what circumstances might you not know whether a listener has
already been added/removed or not?
> add a method hasListener() in ListenerList object
> -------------------------------------------------
>
> Key: PIVOT-611
> URL: https://issues.apache.org/jira/browse/PIVOT-611
> Project: Pivot
> Issue Type: Improvement
> Affects Versions: 1.5
> Reporter: A.J.
> Priority: Minor
>
> there is no easy way to determine wether a listener has already been added to
> a listener list (except by getting an iterator and traversing the list).
> it would be convenient to have 'hasListener' method in the ListenerList class
> that encapsulates this.
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