Objective-C has had generics for years. Here's mention of how they are imported into Swift: https://developer.apple.com/library/content/documentation/Swift/Conc

Objective-C has had generics for years. Here's mention of how they are imported into Swift: https://developer.apple.com/library/content/documentation/Swift/Conceptual/BuildingCocoaApps/InteractingWithObjective-CAPIs.html#//apple_ref/doc/uid/TP40014216-CH4-ID173 https://developer.apple.com/library/content/documentation/Sw...