save before flutter upgrade

lib/functions/date_time_format.dart

@@ -0,0 +1,9 @@
+import 'package:intl/intl.dart';
+
+String dateTimeFormat(DateTime? date) {
+  if (date == null) {
+    return '-';
+  }
+  final formato = DateFormat('MM-dd-yyyy HH:mm:ss');
+  return formato.format(date);
+}