@Override
    public void glVertexAttribDivisorARB(final int index, final int divisor) {
        ARBInstancedArrays.glVertexAttribDivisorARB(index, divisor);
    }
The LWJGL implementation og {@link GLExt}.
jme3-lwjgl3/src/main/java/com/jme3/renderer/lwjgl/LwjglGLExt.java