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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 queue(self):
 """The queue property. Return rq.Queue instance."""

        if not self.include_rq:
            return None
        ctx = stack.top
        if ctx is not None:
            if not hasattr(ctx, 'redislite_queue'):
                ctx.redislite_queue = {}

                for queue_name in self.queues:
                    ctx.redislite_queue[queue_name] = \
                        Queue(queue_name, connection=self.connection)

            return ctx.redislite_queue