private void playAnimations() {
        animComposer.setCurrentAction("Dance", danceLayer);
        animComposer.setCurrentAction("IdleTop", idleLayer);
    }
Plays the "Dance" and "IdleTop" animations on their respective layers.
jme3-examples/src/main/java/jme3test/model/anim/TestSingleLayerInfluenceMask.java