How to use the nornir.core.connections.Connections.register function in nornir

def setup_class(cls):
        Connections.deregister_all()
        Connections.register("dummy", DummyConnectionPlugin)
        Connections.register("dummy2", DummyConnectionPlugin)
        Connections.register("dummy_no_overrides", DummyConnectionPlugin)

def test_register_already_registered_new(self):
        with pytest.raises(ConnectionPluginAlreadyRegistered):
            Connections.register("dummy", AnotherDummyConnectionPlugin)

def setup_method(self, method):
        Connections.deregister_all()
        Connections.register("dummy", DummyConnectionPlugin)
        Connections.register("another_dummy", AnotherDummyConnectionPlugin)

def test_register_already_registered_same(self):
        Connections.register("dummy", DummyConnectionPlugin)
        assert Connections.available["dummy"] == DummyConnectionPlugin

def register_default_connection_plugins() -> None:
    Connections.register("napalm", Napalm)
    Connections.register("netconf", Netconf)
    Connections.register("netmiko", Netmiko)
    Connections.register("paramiko", Paramiko)