rename the get_field_display in django serializer

Question

i am trying to use the get_field_display function in Django in my serializer but I want to rename it to something else(consider it worker_role). what should I do?

class AdminUnsubscriberListSerializer(serializers.ModelSerializer):
    worker_role= "get_role_display"

and the model is :

 class Worker(models.Model):
     ROLE_OPTIONS= [
    ("AD", _("admin")),
    ("WO", _("Worker")),]

        role= models.CharField(
            choices=ROLE_OPTIONS,
            null=True,
            blank=True,
            default=None,
        )