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From Matthew Aguirre <>
Subject [lang] Check for Duplicate Event Listener
Date Mon, 11 May 2015 16:01:46 GMT
I would like to add support to check for a duplicate event listener to the
org.apache.commons.lang3.event.EventListenerSupport class.
This would save me (and possibly others) from then checking the listeners
before adding.

   1. Should I just submit a ticket or should I implement a change within
   2. Since I doubt that a global change would be appreciated, what would
   an acceptable method for signaling duplicate detection be?
      1. Flag in the constructor?
      2. Flag in the addListener method?


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