Flutter mapping

I have looked through the documentation and replicated everything to the best of my knowledge for the flutter SDK and custom class mapping. I am able to retrieve objects with relations but they are not mapping over. This is the error that I continue to get.

Error: Expected a value of type ‘Wash’, but got one of type ‘LinkedMap<Object?, Object?>’

Hello, @Dustin_Miller.

Could you provide a minimally reproducible example?
Please specify where exactly this error is present: web, android or ios.

Best Regards, Nikita