/** if the layer deleted is the current source layer, changes the units option to map units */
@Override
protected final void removedLayerActions(ILayer layer) {
super.removedLayerActions(layer);
ILayer sourceLayer = getSourceLayer();
if (sourceLayer.equals(layer)) {
this.currentUnits = null;
setSelectionUnitOption(this.radioMapUnits);
}
populate();
}
