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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 iterconnections(self):
 """ Iterator of all connections associated with this service, whether cached or not. For testing purposes only. """

        return itertools.chain(
            self.secureConnectionCache.cachedConnections.itervalues(),
            iter(self.subConnections),
            (self.dispatcher or ()) and self.dispatcher.iterconnections())