Class MyClass

tests/test_traitlets.py:2165–2171

    def test_link_broken_at_source(self):
        class MyClass(HasTraits):
            i = Int()
            j = Int()

            @observe("j")
            def another_update(self, change):
                self.i = change.new * 2

        mc = MyClass()
        l = link((mc, "i"), (mc, "j"))  # noqa: E741