old_contents: import asyncio
  from typing import Any, Mapping, Tuple
  
  import aiohttp
  
  from . import abc as gh_abc
  
  
  class GitHubAPI(gh_abc.GitHubAPI):
  
      def __init__(self, session: aiohttp.ClientSession, *args: Any,
                   **kwargs: Any) -> None:
          self._session = session
          super().__init__(*args, **kwargs)
  
      async def _request(self, method: str, url: str, headers: Mapping,
                         body: bytes = b'') -> Tuple[int, Mapping, bytes]:
          async with self._session.request(method, url, headers=headers,
                                           data=body) as response:
              return response.status, response.headers, await response.read()
  
      async def sleep(self, seconds: float) -> None:
          await asyncio.sleep(seconds)
  
new_contents: import asyncio
  from typing import Any, Mapping, Tuple
  
  import aiohttp
  
  from . import abc as gh_abc
  
  
  class GitHubAPI(gh_abc.GitHubAPI):
  
      def __init__(self, session: aiohttp.ClientSession, *args: Any,
                   **kwargs: Any) -> None:
          self._session = session
          super().__init__(*args, **kwargs)
  
      async def _request(self, method: str, url: str, headers: Mapping[str, str],
                         body: bytes = b'') -> Tuple[int, Mapping[str, str], bytes]:
          async with self._session.request(method, url, headers=headers,
                                           data=body) as response:
              return response.status, response.headers, await response.read()
  
      async def sleep(self, seconds: float) -> None:
          await asyncio.sleep(seconds)
  
subject: Update aiohttp for mypy