public void add(String name, String layerName, int firstFrame, int lastFrame) {
        AnimInverval cue = new AnimInverval();
        cue.name = name;
        cue.layerName = layerName;
        cue.firstFrame = firstFrame;
        cue.lastFrame = lastFrame;
        list.add(cue);
    }
Use in the case of multiple animation layers in FBX asset

@param name - animation name to access via {@link com.jme3.animation.AnimControl}
@param layerName - source layer
@param firstFrame the index of the first frame
@param lastFrame the index of the last frame
jme3-plugins/src/fbx/java/com/jme3/scene/plugins/fbx/AnimationList.java