@Override
    public void glDrawElementsInstancedARB(final int mode, final int indicesCount, final int type,
                                           final long indicesBufferOffset, final int primCount) {
        ARBDrawInstanced.glDrawElementsInstancedARB(mode, indicesCount, type, indicesBufferOffset, primCount);
    }
The LWJGL implementation og {@link GLExt}.
jme3-lwjgl3/src/main/java/com/jme3/renderer/lwjgl/LwjglGLExt.java