@Override
    public void destroy() {
        if (ds != null) {
            JAWT_FreeDrawingSurface(ds, awt.FreeDrawingSurface());
            awt.free();
        }
    }
(non-Javadoc)
@see com.jme3.system.lwjglx.LwjglxGLPlatform#destroy()
jme3-lwjgl3/src/main/java/com/jme3/system/lwjglx/X11GLPlatform.java