def METHOD_NAME(self, field):
    """
    Assumes that a serializer field exist with the same name as form field.
    TODO:
    In case there are form fields not existing in serializer fields, we would
    have to create mapping b/w form fields and serializer fields to get the
    respective classes. But for now this works.
    """
    if isinstance(field, BlockFieldWrapper):
        return serializers.CharField
    if isinstance(field, ScoredAnswerField):
        return ScoredAnswerListField
    if isinstance(field, TypedChoiceField):
        return serializers.ChoiceField
    class_name = field.__class__.__name__
    return getattr(serializers, class_name)