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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def atlas_zonefile_push_dequeue( zonefile_queue=None ):
 """ Dequeue a zonefile's information to replicate Return None if there are none queued """

    ret = None
    with AtlasZonefileQueueLocked(zonefile_queue) as zfq:
        if len(zfq) > 0:
            ret = zfq.pop(0)

    return ret