How do you tell if an optional multi transclude property has been set?

[waeljammal]

Basically I can not find a way to check if an optional transclude was supplied, I want to show hide the parent based on the transclude being set or not.

If there is no way is it possible to get this added? It is a useful feature to along side optional transclude.

Thanks

[petebacondarwin]

This is something that @PascalPrecht was asking for too, I think...

[petebacondarwin]

A benefit of this would be that we could provide default content in ngTransclude for optional transclusion slots.

[petebacondarwin]

Here is a PR: #13431