gistfile1.txt

func getValue<T>(forId id: String) throws -> T {
        
        for group in groups {
            if let value = group.getValue(forId: id) {
                
                switch value {
                case .enumeration(let state):
                    if let result = state.current as? T {
                        return result
                    } else {
                        throw SettingsError.noValueForId
                    }
                case .toggle(let value):
                    if let result = value as? T {
                        return result
                    } else {
                        throw SettingsError.noValueForId
                    }
                }
            }
        }
        
        throw SettingsError.noValueForId
    }