source property

dynamic source

final

The actual source input which caused the error.

This is usually a String, but can be other types too. If it is a string, parts of it may be included in the toString message.

The source is null if omitted or unknown.

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/FormatException/source.html