code: def visualize(
      self,
      filename: str = "mydask",
      format: str | None = None,
      optimize_graph: bool = False,
      **kwargs: Any,
  ) -> DisplayObject | None:
      return dask.visualize(
          self,
          filename=filename,
          format=format,
          optimize_graph=optimize_graph,
          **kwargs,
      )
  
imports: from __future__ import annotations
  from collections.abc import Hashable, Mapping, Sequence
  from typing import Any
  import pytest
  import dask
  import dask.threaded
  from dask.base import DaskMethodsMixin, dont_optimize, tokenize
  from dask.context import globalmethod
  from dask.delayed import Delayed, delayed
  from dask.typing import DaskCollection, Graph, HLGDaskCollection, Key, NestedKeys, PostComputeCallable, PostPersistCallable
label_desc: Use image node_id 9 for calling the Inheriting obj's underlying member method code with example usage: obj.visualize(filename, format, optimize_graph) and returns: dask