Serializing a variable inside a generic class in Dart with NNBD

Question

I have a generic class MyClass<T> which can serialize and deserialize values of type T via Serializers class. Before migrating to NNBD constructing a serializer was straightforward:

MyClass<T> {
    Serializer serializer() => serializers.serializerForType(T);
    ...
}

This sill works in cases when MyClass is instantiated with a non-nullable type (e.g. MyClass<Foo>). But with a nullable type (e.g. MyClass<Foo?>) serializers.serializerForType(T) returns null. Apparently Foo and Foo? are considered different types, hence the serializer is not found.

Is it possible to get a non-nullable type given a nullable type (I've only found this answer but it didn't help) or otherwise get the serializer?