成员的完整列表，这些成员属于 com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService,包括所有继承而来的类成员

addSubscribeListener(V2NIMSubscribeListener listener)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService
publishCustomUserStatus(V2NIMCustomUserStatusParams params, V2NIMSuccessCallback< V2NIMCustomUserStatusPublishResult > success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService
queryUserStatusSubscriptions(List< String > accountIds, V2NIMSuccessCallback< List< V2NIMUserStatusSubscribeResult >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService
removeSubscribeListener(V2NIMSubscribeListener listener)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService
subscribeUserStatus(V2NIMSubscribeUserStatusOption option, V2NIMSuccessCallback< List< String >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService
unsubscribeUserStatus(V2NIMUnsubscribeUserStatusOption option, V2NIMSuccessCallback< List< String >> success, V2NIMFailureCallback failure)	com.netease.nimlib.sdk.v2.subscription.V2NIMSubscriptionService