class_docstr: Validate that object_type is indeed an object type.
code: def to_url(self, value: Any) -> str:
      return value.name
  
file_path: superset/superset/utils/url_map_converters.py
imports: from typing import Any
  from werkzeug.routing import BaseConverter, Map
  from superset.tags.models import ObjectType
label_desc: Use image node_id 2 for calling the ObjectTypeConverter obj's underlying member method code with example usage: obj.to_url(value) and returns: value