@Override
    public void glObjectLabel(int identifier, int id, String label) {
        assert label != null;
        KHRDebug.glObjectLabel(identifier, id, label);
    }
The LWJGL implementation og {@link GLExt}.
jme3-lwjgl3/src/main/java/com/jme3/renderer/lwjgl/LwjglGLExt.java