 
     fileprivate enum ChannelType: String {
         case channel, group, im
+    }
+
+    public enum ConversationType: String {
+        case public_channel, private_channel, mpim, im
     }
 
     fileprivate let networkInterface: NetworkInterface

        excludeArchived: Bool = false,
        cursor: String? = nil,
        limit: Int? = nil,
        types: [String]? = nil,
        success: ((_ channels: [[String: Any]]?) -> Void)?,
        failure: FailureClosure?
    ) {

            parameters["limit"] = limit
        }
        if let types = types {
            parameters["types"] = types.map({ $0.rawValue }).joined(separator: ",")
        }
        networkInterface.request(.conversationsList, parameters: parameters, successClosure: {(response) in
            success?(response["channels"] as? [[String: Any]])
