def isiopending(self, slabkey):
         with self.iocond:
             status = slabkey in self.iopending
         return status
Mutes the player. The difference between this and setVolume(0) is that the
dataset/ETHPy150Open MapQuest/mapquest-osm-server/src/python/datastore/lrucache.py/LRUIOCache.isiopending--crossover with--dataset/ETHPy150Open pyjs/pyjs/pyjswaddons/FlowPlayer.py/Player.mute