Workaround for javac compilation issue of lambda code

     * Compares two window sub-layers and returns -1 if the first is lesser than the second in terms

     * of z-order and 1 otherwise.

     */

    private static final Comparator<WindowState> sWindowSubLayerComparator = (w1, w2) -> {

    private static final Comparator<WindowState> sWindowSubLayerComparator =

            new Comparator<WindowState>() {

                @Override

                public int compare(WindowState w1, WindowState w2) {

                    final int layer1 = w1.mSubLayer;

                    final int layer2 = w2.mSubLayer;

                    if (layer1 < layer2 || (layer1 == layer2 && layer2 < 0 )) {

            // We insert the child window into the list ordered by the sub-layer.

            // For same sub-layers, the negative one should go below others; the positive one should

            // go above others.

                        // We insert the child window into the list ordered by

                        // the sub-layer.  For same sub-layers, the negative one

                        // should go below others; the positive one should go

                        // above others.

                        return -1;

                    }

                    return 1;

                };

            };

    WindowState(WindowManagerService service, Session s, IWindow c, WindowToken token,

           WindowState parentWindow, int appOp, int seq, WindowManager.LayoutParams a,