v2::V2NIMChatroomCdnInfo 成员列表

成员的完整列表，这些成员属于 v2::V2NIMChatroomCdnInfo,包括所有继承而来的类成员

cdnUrls	v2::V2NIMChatroomCdnInfo
decryptKey	v2::V2NIMChatroomCdnInfo
decryptType	v2::V2NIMChatroomCdnInfo
enabled	v2::V2NIMChatroomCdnInfo
pollingInterval	v2::V2NIMChatroomCdnInfo
pollingTimeout	v2::V2NIMChatroomCdnInfo
timestamp	v2::V2NIMChatroomCdnInfo