class_docstr: A `div` that can be edited.
code: def render(self):
      if self._rendered:
          raise ValueError("Can't call `render` twice.")
      self._root_elem.render()
      self._rendered = True
      self.append(self.elem)
  
imports: from __future__ import annotations
  import abc
  import dataclasses
  import functools
  import sys
  import uuid
  from typing import Any, Union
label_desc: Use image node_id 3 for calling the DynamicDiv obj's underlying member method code with example usage: obj.render() without return types