有没有办法用Decodable忽略某些键，只提取它们的值？

struct MyStruct: Decodable {
    let key1: String
    let key2: String

    private enum CodingKeys: String, CodingKey {
        case key1
        case key2
        case ignoredKey
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: CodingKeys.self)
        key1 = try container.decode(String.self, forKey: .key1)
        key2 = try container.decode(String.self, forKey: .key2)

        // 忽略 ignoredKey，不进行解码
        _ = try container.decode(String.self, forKey: .ignoredKey)
    }
}