A Swift library of data source and delegate objects inspired by Andy Matuschak's type-safe, value-oriented collection view data source gist. This library reduces the boilerplate code regarding the UITableView, UICollectionView, and NSFetchedResultsController data source objects, as well as the NSFetchedResultsControllerDelegate object. It helps keep view controllers light, while focusing on type-safety, SOLID design principles, and easy interoperability with Cocoa. Further, it brings a more focused and data-driven perspective to these data sources. If you want to change your view then you change your data and its structure, without needing to update any data source or delegate protocol methods.