class_docstr: Writes a single pyi file
class_docstr_tok: ["Writes","a","single","pyi","file"]
code: def _output_type(
      self,
      method: d.MethodDescriptorProto,
      use_stream_iterator: bool = True,
  ) -> str:
      result = self._import_message(method.output_type)
      if use_stream_iterator and method.server_streaming:
          result = (
              f"{self._import('collections.abc', 'Iterator')}[{result}]"
          )
      return result
  
imports: from __future__ import annotations
  import sys
  from collections import defaultdict
  from contextlib import contextmanager
  from typing import Any, Callable, Dict, Iterable, Iterator, List, Optional, Set, Sequence, Tuple
  import google.protobuf.descriptor_pb2
  from google.protobuf.compiler import plugin_pb2
  from google.protobuf.internal.containers import RepeatedCompositeFieldContainer
  from google.protobuf.internal.well_known_types import WKTBASES
  from .None import extensions_pb2
label_desc: Use image node_id 22 for calling the PkgWriter obj's underlying member method code with example usage: obj._output_type(method, use_stream_iterator) and returns: result