How to filter messages in beforeSend using Dart SDK

[jamesncl]

I have an exception being reported from a Flutter app in my Sentry dashboard (see image below). It's something that is non critical, and I'm unable to reproduce it in dev, but it's causing my quota to be obliterated. I'd therefore like to use beforeSend to block this exception from hitting Sentry servers.

However I'm unsure what properties of SentryEvent to use to do this filtering. I've come up with 3 possibilities:

• search message for the text "range_slider.dart", line 1552, in _RenderRangeSlider.assembleSemanticsNode
• search exceptions to see if any contain a string value containing text "range_slider.dart", line 1552, in _RenderRangeSlider.assembleSemanticsNode
• search exceptions.frames to see if any have fileName of range_slider.dart and lineNo 1552

See example below. Can anyone suggest which of these 3 would be best, or suggest a better way to do this? Unfortunately because I can't reproduce the error in dev I can't really test this out.

 SentryFlutter.init((options) {
      options.dsn = SENTRY_DSN;
      options.beforeSend = (SentryEvent event, {dynamic hint}) {
        //????????????
        bool ignore = event.message?.formatted.contains("\"range_slider.dart\", line 1552, in _RenderRangeSlider.assembleSemanticsNode") ?? false;
        bool ignore = event.exceptions?.any((e) => e.value?.contains("\"range_slider.dart\", line 1552, in _RenderRangeSlider.assembleSemanticsNode") ?? false) ?? false;
        bool ignore = event.exceptions?.any((e) => e.stackTrace?.frames.any((f) => f.fileName == "range_slider.dart" && f.lineNo == 1552) ?? false) ?? false;
        
        if(ignore) {
          return null;
        }
        else {
          return event;
        }
      };
    },
  );