getGenericToJsonFn function
Resolves a generic toJson function for the provided type.
Implementation
Object? Function(Never) getGenericToJsonFn(
Map<Type, Object? Function(Never)> fns,
Type type,
) {
var type1_fn = fns[type];
if (type1_fn == null) //
return (x) => x;
return type1_fn;
}