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def __connection_ready_cb(self, connection):
        # http://bugs.sugarlabs.org/ticket/3326
        #
        # Daniel Drake has given a comprehensive description of the
        # issue. So the fix is that, when the
        # dangling-connection-object calls the "__connection_ready_cb",
        # check to see if it is the same as the referenced
        # "self._connection" object. If not, simply return; this would
        # have the following consequences ::
        #
        #  (i)
        #  not connect any more signals to the
        #  dangling-connection-object.
        #
        #  (ii)
        #  the dangling-connection-object would finally be
        #  garbage-collected.
        if connection != self._connection:
            return