Function on_add

tests/integration/test_patch.py:502–505

(_)

        Output("store", "data"), Input("add-one", "n_clicks"), prevent_initial_call=True
    )
    def on_add(_):
        patched = Patch()
        patched += 1
        return patched

    @app.callback(
        Output("store", "data", allow_duplicate=True),