The ordering index is an odd parameter, and if you think you
don’t need it you’re probably right. In general, the application
indicator service will try to place the indicators in a
recreatable place taking into account which category they’re in
to try and group them. But, there are some cases when you’d want
to ensure indicators are next to each other. To do that you can
override the generated ordering index and replace it with a new
one. Again, you probably don’t want to do this, but in case you
do, this is the way.