Using SerializerMethodField with WritableNestedModelSerializer

[Mohamed-Kaizen]

i try to use SerializerMethodField with WritableNestedModelSerializer but it's not working

class BinCreateUpdateSerializer(WritableNestedModelSerializer):
    """Serializer for creation and update bin model."""
    warehouse = serializers.SerializerMethodField()
    def get_warehouse(self, obj):
        print(obj)
        return obj

the method never called