I want to automate DropDownList when DropDownList id and item index are provided.
I can get DropDownList object on that object I can set selectedIndex as

```
dropDownObject.selectedIndex=index;

```

this can change DropDownList selected item to specified index item but when I dispatch "change" event on IndexChangeEvent object it is giving typeCoersion error.

> 
> can not convert spark.events::IndexChangeEvent@138445 to spark.events.IndexChangeEvent
> 
> 
>