// command handlers
gridLayer.registerCommandHandler(new MultiTurnViewportOnCommandHandler(
bodyLayer.getViewportLayerLeft(), bodyLayer
.getViewportLayerRight()));
gridLayer
.registerCommandHandler(new MultiTurnViewportOffCommandHandler(
bodyLayer.getViewportLayerLeft(), bodyLayer
.getViewportLayerRight()));
// Wrap NatTable in composite so we can slap on the external horizontal
// sliders