The system detects automatically the name of an adder or remover of a collection by an ENGLISH logic I guess. It relates a dependency to a human langage and not PHP... Moreover, I suppose it forces an execution time by parsing words or something else.

For greater flexibility, it would be a good idea to let the developper what the developper has to do (understand and write its own HUMAN langage)... In my case, I have to use some specific French words for a collection, and my logic is broken by an english one. I think we would be able to set the adder and remover name in the annotation. By default, an english logic could be applyed, why not ?