7.swift

extension JSONDecoder {
    /// Decode a heterogeneous list of objects.
    /// - Parameters:
    ///     - family: The ClassFamily enum type to decode with.
    ///     - data: The data to decode.
    /// - Returns: The list of decoded objects.
    func decode<T: ClassFamily, U: Decodable>(family: T.Type, from data: Data) throws -> [U] {
        return try self.decode([ClassWrapper<T, U>].self, from: data).compactMap { $0.object }
    }
}