convert the given expression for deserialization.
the expression is Dart code that evaluates to an iterable,
so you need to convert this iterable to your custom type
@param expression the expression, that evaluates to an Iterable
@param resolvedGenericType the generic type of the list that will be deserialized
@return A String, which is a Dart expression that evaluates to your custom Iterable type
convert the given expression for serialization.
The expression is dart code that evaluates to your custom iterable type.
you need to return an expression that evaluates to a Dart list