Function handler1

test/unit/observable.js:232–235

()

    event1Fired = false, event2Fired = false,
    event3Fired = false, event4Fired = false,
    handler1 = function () {
      event1Fired = true;
      foo.off('bar:baz', handler1);
    },
    handler2 = function () {
      event2Fired = true;
    },