Y-Sort of multiple FlxTypedGroups?

[Rich Walter]

Hi, was wondering if it is possible to Y-Sort (or any sort) across multiple FlxTypedGroups? For instance, I have:

enemyBullets:FlxTypedGroup<FlxSprite>

playerBullets:FlxTypedGroup<FlxSprite>

entities:FlxTypedGroup<FlxSprite>

etc...

And I want to properly display depth based on their y position. Easy to do with just one group, but how to sort across all the groups? Do I have to add each group into a "master group" and just sort on that?

Thanks,

Rich