def getIdentifier(self):
        if self.mIsMangled:
            return self.mId.rsplit("_", 1)[0]
        else:
            return self.mId
Unregisters DISCO handler that is resonsible for this
dataset/ETHPy150Open CGATOxford/cgat/CGAT/Mali.py/AlignedString.getIdentifier--crossover with--dataset/ETHPy150Open CouchPotato/CouchPotatoServer/libs/xmpp/browser.py/Browser.delDiscoHandler