onGroupEvent method Null safety

void onGroupEvent(
  1. EMMultiDevicesEvent event,
  2. String groupId,
  3. List<String>? usernames
)

The multi-device event callback of group.

Param event The event type.

Param groupId The group ID.

Param usernames The array of usernames.

Implementation

void onGroupEvent(
  EMMultiDevicesEvent event,
  String groupId,
  List<String>? usernames,
);