It doesn’t do anything in the way I use it.
I searched the example apps to see whether I do it wrong, but I cannot find it in the examples.
EDIT:
It was pretty obvious. I didn’t think of inherited properties, and I just needed to give it a width.
Still, I couldn’t find it in the example apps, so they could probably use an update.
If Separator were to be included in Examples within the SDK, then every module would warrant inclusion, this I think is a little unnecessary for a module that has very few properties, making an example a bit unnecessary when documentation covers the basic properties.
Admittedly, the given examples are somewhat lacklustre and are thin on the ground.
Personally, I just prefer to make a temporary app and play, for me, this is how I learn what does what.