code: def __init__(self, graph: ChunkGraph):
      self._graph = graph
  
file_path: mars/mars/optimization/physical/core.py
imports: from abc import ABC, abstractmethod
  from typing import List, Tuple, Dict, Type
  from ...core import ChunkGraph, ChunkType, OperandType
  from ...utils import build_fuse_chunk
label_desc: Use image node_id 1 to create a new RuntimeOptimizer object from inherited base classes: ABC with example: obj = RuntimeOptimizer(graph)