code: def __await__(self):
      return self._done.wait().__await__()
  
imports: import asyncio
  import logging
  from functools import partial
  from typing import Callable, Dict, List, Iterable, Set
  from ....config import Config
  from ....core import TileableGraph, ChunkGraph, ChunkGraphBuilder, TileContext
  from ....core.graph.builder.chunk import Tiler, _TileableHandler
  from ....core.operand import Fetch, ShuffleFetchType
  from ....resource import Resource
  from ....typing import BandType, TileableType, ChunkType
  from ...subtask import Subtask, SubtaskGraph
  from ..analyzer import GraphAnalyzer
  from ..core import Task, MapReduceInfo
label_desc: Use image node_id 13 for calling the TaskPreprocessor obj's underlying member method code with example usage: obj.__await__() and returns: self