addSyncRoamingMessageListener method Null safety

dynamic addSyncRoamingMessageListener(
  1. JMSyncRoamingMessageListener callback,
  2. {String? id}
)

Implementation

addSyncRoamingMessageListener(JMSyncRoamingMessageListener callback,
    {String? id}) {
  _eventHanders.syncRoamingMessage.add(callback);
}