def METHOD_NAME(self, content_type_id):
    """Return the QuerySet from the QuerySetSequence for a ctype."""
    content_type = ContentType.objects.get_for_id(content_type_id)
    for queryset in self.queryset.get_querysets():
        if queryset.model.__name__ == 'QuerySequenceModel':
            # django-queryset-sequence 0.7 support dynamically created
            # QuerySequenceModel which replaces the original model when it
            # patches the queryset since 6394e19
            model = queryset.model.__bases__[0]
        else:
            model = queryset.model
        if model == content_type.model_class():
            return queryset