Function callback

test/stateful-test.js:85–93

()

  // to be executed on save ("line A" below)
  const callback = () => {
    new Demo('test_state_key').load().then((demo) => {
      t.is(demo.state.x, 3);
      t.end();
    })
    .catch((err) => {
      t.fail(`ERR4: ${err}`);
    });
  };

  new Demo('test_state_key').load().then((demo) => {
    const state = demo.state;