Hey guys,
after creating a container with BC 15.0 and updating my extension, I get the above error message.
This warning will become an error in future releases, but I thought it would be better, to solve it already.
My page consits of many actions. Some of them are below the area "Embedding" and are grouped.
Maybe the grouping is what causes problems?!
Here you see my code:

What do you think?