Adding re-usable collection definitions

[mattbrailsford]

When adding collections, if you show the same collection in multiple places you can end up with some repetition so is there a way to create baseline collection configs and then when adding a collection it duplicates that config and applies the explicit changes over the top.

This was another suggestion by Callum. My initial though is, can this just be handled in extension methods? Or is an explicit API more benefitial?