聊天SDK 3.1.12 SBDGroupChannelCollection

SBDGroupChannelCollection.h :

// Loads more page.

/// @param completionHandler The completion handler to be executed.

/// @since 3.1.0

  • (void)loadMoreWithCompletionHandler:(nullable void (^)(NSArray<SBDGroupChannel *> * _Nullable channels, SBDError * _Nullable error))completionHandler;

Why is the callback(completionHandler) for this method not executed???