     
     /// クライアント ID
     public let clientId: String?
+    
+    /// 接続 ID
+    public let connectionId: String?
     
     /// 音声の可否
     public let audioEnabled: Bool?

        subscriberCount = try container.decodeIfPresent(Int.self, forKey: .subscriberCount)
        channelId = try container.decodeIfPresent(String.self, forKey: .channelId)
        clientId = try container.decodeIfPresent(String.self, forKey: .clientId)
        audioEnabled = try container.decodeIfPresent(Bool.self, forKey: .audio)
        videoEnabled = try container.decodeIfPresent(Bool.self, forKey: .video)
        spotlightId = try container.decodeIfPresent(String.self, forKey: .spotlightId)

        case subscriberCount = "channel_downstream_connections"
        case channelId = "channel_id"
        case clientId = "client_id"
        case connectionId = "connection_id"
        case spotlightId = "spotlight_id"
        case audio = "audio"
        case video = "video"
