brianraymes opened a new pull request #879:
URL: https://github.com/apache/royale-asjs/pull/879
I noticed that the `[Bindable("lengthChanged")]` was added to the length
property, but the event is not dispatched when an item is either added or
removed.
**Steps to Reproduce**
1. _Create a bindable ArrayList_
```
[Bindable]
public var names:ArrayList = new ArrayList(["A", "B", "C"]);
```
2. _Bind something to the length property_
```
<j:Label text="Length: {names.length}"/>
```
3. _Add an item_
```
names.addItem("D");
```
**Expected Results**
Label is updated from `Length: 3` to `Length: 4`.
**Actual Results**
Label is not updated and remains as `Length: 3`.
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