Collection of Database/Actor/etc. as a participant in sequence diagrams?

Question

In sequence diagrams, I would like to be able to make collections of other participant types (Database, Actor, Control, etc.). Currently you can only create collections of square boxes.

It would be great if we could just use the plural form of a participant.

Ex:

Single Participant	Collecton of Participant
actor	actors
boundary	boundaries
etc.	etc.

Answer 1

You could simulate it with shadowing

Comments

I think plurality is something that should be looked at across the board.

I am with OP on this!