The message search direction, Default is ChatSearchDirection.UP.
The end time for message query. The time is a UNIX time stamp in milliseconds.
OptionalfromThe user ID of the message sender in the group conversation.
OptionalmsgThe array of message types for query. The default value is undefined, indicating that all types of messages are retrieved.
Whether to save the retrieved messages to the database:
true: save to database;false(Default)：no save to database.The start time for message query. The time is a UNIX time stamp in milliseconds. The default value is -1,indicating that this parameter is ignored during message query.If the [startTs] is set to a specific time spot and the [endTs] uses the default value -1,the SDK returns messages that are sent and received in the period that is from the start time to the current time.If the [startTs] uses the default value -1 and the [endTs] is set to a specific time spot,the SDK returns messages that are sent and received in the period that is from the timestamp of the first message to the current time.
The parameter configuration class for pulling historical messages from the server.