@Override
    public void read(JmeImporter im) throws IOException {
        InputCapsule ic = im.getCapsule(this);
        name = ic.readString("name", null);
        mask = (AnimationMask) ic.readSavable("mask", null);
    }
Converts this shallow-cloned layer into a deep-cloned one, using the
specified Cloner and original to resolve copied fields.

<p>The clone's current Action gets nulled out. Its manager and mask get
aliased to the original's manager and mask.

@param cloner the Cloner that's cloning this layer (not null)
@param original the instance from which this layer was shallow-cloned
    (not null, unaffected)
jme3-core/src/main/java/com/jme3/anim/AnimLayer.java