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Eduardo Sanz García authoredFollowing on @robertknight [suggestion](https://github.com/hypothesis/client/pull/3035#pullrequestreview-599668554) I created a tiny utility to make easier to unregister event listeners.
2a814392
Following on @robertknight [suggestion](https://github.com/hypothesis/client/pull/3035#pullrequestreview-599668554) I created a tiny utility to make easier to unregister event listeners.