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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_routers_on_hosting_device(self, client, hosting_device_id, **_params):
 """Fetches a list of routers hosted on a hosting device."""

        res_path = hostingdevice.HostingDevice.resource_path
        return client.get((res_path + DEVICE_L3_ROUTERS) %
                          hosting_device_id, params=_params)