tricky!

I had some getters and setters in Actionscript that were accessing a private member variable _status, which looked like:

private var _status:String;

// Getters and setters for status                                                                                        
public function get status():String {
   return _status;
}

[Bindable(event="statusChanged")]
public function set status(value:String):void {
   _status = value;
   statusChanged = true;
   invalidateProperties();
   dispatchEvent(new StatusChangeEvent(value));
}

I couldn't figure out how to call the setter function from Actionscript, and looked all over. Turns out the solution is way easier than I imagined, just set the "status" variable:

status = STATUS_BUSY;

This calls the appropriate setter.