What’s the purpose of the bright orange boxes?

[Aero]

Does anyone know how to achieve these bright orange boxes I’ve seen used.
Attempted dragging the same behaviors over each other, can’t seem to find any documentation how this is achieved or what purpose it serves.

[Hamed]

These are deprecated behaviours. There's a newer version of those behaviours. If the project is already working for you, you don't need to change anything. If you need the updated behaviour, you simply add the new version of that behaviour and remove the deprecated one.