runTransaction method
      
Future<Map<String, dynamic> > 
runTransaction(
    
- TransactionHandler transactionHandler, {
- Duration timeout = const Duration(seconds: 10),
Doubled the attempt duration to 10 seconds.
Implementation
Future<Map<String, dynamic>> runTransaction(
        TransactionHandler transactionHandler,
        {Duration timeout = const Duration(seconds: 10)}) =>
    _store.runTransaction(
        transactionHandler as Future<Map<String, dynamic>> Function(
            Transaction),
        timeout: timeout);