public override void PostLoad() {
Assert(designatorClass != null, "designatorClass field must be set");
Assert(designatorClass != null && typeof (Designator_SelectableThings).IsAssignableFrom(designatorClass), "designatorClass must extend Designator_SelectableThings");
Assert(category != null, "category field must be set");
Assert(insertAfter != null, "insertAfter field must be set");
Assert(iconTex != null, "icon texture must be set");
Assert(dragHighlightTex != null, "drag highlight texture must be set");
}