See https://github.com/flutter/flutter/pull/143588/files.

I would have expected that the following doc comment generates a dartdoc error because "SnackBarAction." (note the dot at the end) is not a valid reference. Instead, it silently interprets [SnackBarAction.] as [SnackBarAction] and links to the class. So, we totally missed, that the reference was incomplete.

/// Overrides default value for [SnackBarAction.].