@Override
    public TransformTrack jmeClone() {
        try {
            TransformTrack clone = (TransformTrack) super.clone();
            return clone;
        } catch (CloneNotSupportedException ex) {
            throw new AssertionError();
        }
    }
De-serializes this track from the specified importer, for example when
loading from a J3O file.

@param im the importer to read from (not null)
@throws IOException from the importer
jme3-core/src/main/java/com/jme3/anim/TransformTrack.java