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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 list_hosting_devices_hosting_routers(self, client, router_id, **_params):
 """Fetches a list of hosting devices hosting a router."""

        return client.get((client.router_path + L3_ROUTER_DEVICES) %
                          router_id, params=_params)