Give Lookup and other transformed data structures an Update method | Perhaps Updatable Data Structures Can be Retuned by .ToUpdatable*

[sirinath]

The problem I am having is that:

1. Calling ToLookup multiple times as data changes is wistful in terms of memory and cycles
2. Maintaining 2 data structures with the needed mapping violates the single source of truth and can case subtle bugs

So is it possible to give the Lookup and Update or Pull method which updates the lookup from initial data structures changes much more efficiently.

Though not something I want immediately, this can be applied to the other To* data structures too. This will need some additional API plumbing, but as I see it Lookup case could be easy.

Maybe you can have .ToUpdatable* which can return updatable data structures.