class_docstr: ORC Function-Wrapper Class
  Reads ORC data from disk to produce a partition.
class_docstr_tok: ["ORC","Function-Wrapper","Class","Reads","ORC","data","from","disk","to","produce","a","partition","."]
code: def __call__(self, parts):
      _df = self.engine.read_partition(
          self.fs,
          parts,
          self.schema,
          self.columns,
      )
      if self.index:
          _df.set_index(self.index, inplace=True)
  
      return _df
  
imports: from __future__ import annotations
  import copy
  from typing import TYPE_CHECKING, Literal
  from fsspec.core import get_fs_token_paths
  from fsspec.utils import stringify_path
  from dask.base import compute_as_if_collection, tokenize
  from dask.dataframe.backends import dataframe_creation_dispatch
  from dask.dataframe.core import DataFrame, Scalar
  from dask.dataframe.io.io import from_map
  from dask.dataframe.io.orc.utils import ORCEngine
  from dask.dataframe.io.utils import DataFrameIOFunction
  from dask.highlevelgraph import HighLevelGraph
  from dask.utils import apply
label_desc: Use image node_id 4 for calling the ORCFunctionWrapper obj's underlying member method code with example usage: obj.__call__(parts) and returns: _df