metatype

import UIKit

class Widget {
    let name: String
    required init(name: String) {
        self.name = name
    }
}
func createWidget<T: Widget>(ofType: T.Type) -> T {
    let widget = T.init(name: "Roq")
    return widget
}

let a = createWidget(ofType: Widget.self)
print("\(a.name)")