@Override
    public void write(JmeExporter e) throws IOException {
        super.write(e);
        OutputCapsule capsule = e.getCapsule(this);
        capsule.write(xExtent, "xExtent", 0);
        capsule.write(yExtent, "yExtent", 0);
        capsule.write(zExtent, "zExtent", 0);
    }
Reconfigure with the specified extremes.

@param min the desired minimum coordinate value for each axis (not null,
not altered)
@param max the desired maximum coordinate value for each axis (not null,
not altered)
jme3-core/src/main/java/com/jme3/bounding/BoundingBox.java