Somewhere in your code you very precisely define a function named getData

Here's your definition:

func getData<T>(url: String, data: (T?, String?) -> ()) where T : Decodable { // details removed }

You’re telling Swift that at some point you will want to call getData, where it retrieves objects of type Cars. In another part of the app you may call getData and retrieve objects of type BroadwayShows.

In short, you are saying getData should work with any Type (shorthand “T”) as long as that type conforms to the Decodable protocol.

But when you use the getData function in code, you have to provide a hint to the compiler. I think you’re missing the hint and Swift tries, but fails, to guess (infer) the data type.

Try this?

// Use my cool getData function!  Provide a hint!
self.getJson.getData<Card>(url: Urls.new.rawValue) { news, error in 
            print("error")
        }

Nota bene: fetch! not featch.