Aggregator: completionInterval

Hello everyone,

I'm trying to use the completion interval property of aggregator. I am
successful using it like that:

<aggregate strategyRef="myAggregator" completionInterval="1000">
...
...
</aggregate>

But this way doesn't allow my to use dynamic values for completion interval
because it only accepts a long value.

In similar properties like completionTimeout it is possible to do:

<aggregate strategyRef="myAggregator">

<completionTimeout><simple>${properties:timeoiut}</simple></completionTimeout>
...
...
</aggregate>

But this possibility doesn't exist for completion interval.

Anyone can help me on that?

Thanks!