def METHOD_NAME():
    class DemoStateMachine(stateful.RuleBasedStateMachine):
        Stuff = stateful.Bundle("stuff")
        @stateful.rule(target=Stuff, name=st.text())
        def create_stuff(self, name):
            return name
        @stateful.rule(item=Stuff)
        def do(self, item):
            return
    stats = call_for_statistics(DemoStateMachine.TestCase().runTest)
    assert len(unique_events(stats)) <= 2