>if you can get yourself away from trying to access features on concrete 
>instances
(…)

>var animateBead:IAnimateBead = indicator_content.getBeadByType(IAnimateBead);
>animateBead.animate();

Is this PAYG? getBeadByType iterates through an array.
Also, animateBead may turn out to be null which adds a level of uncertainty as 
to whether or not this will run.

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