disappearing dependencies when cloning about paradox HOT 3 OPEN

#' A collection of multiple [ParamSet] objects.
#' * The collection is basically a light-weight wrapper / container around references to multiple sets.
#' * In order to ensure unique param names, every param in the collection is referred to with
#'   "<set_id>.<param_id>". Parameters from ParamSets with empty (i.e. `""`) `$set_id` are referenced
#'   directly. Multiple ParamSets with `$set_id` `""` can be combined, but their parameter names
#'   must be unique.
#' * Operation `subset` is currently not allowed.
#' * Operation `add` currently only works when adding complete sets not single params.
#' * When you either ask for 'values' or set them, the operation is delegated to the individual,
#'   contained param set references. The collection itself does not maintain a `values` state.
#'   This also implies that if you directly change `values` in one of the referenced sets,
#'   this change is reflected in the collection.
#' * Dependencies: It is possible to currently handle dependencies
#'      * regarding parameters inside of the same set - in this case simply
#'        add the dependency to the set, best before adding the set to the collection
#'      * across sets, where a param from one set depends on the state
#'        of a param from another set - in this case add call `add_dep` on the collection.
#'
#'   If you call `deps` on the collection, you are returned a complete table of dependencies, from sets and across sets.