docs: async def write_request(
          self, method: constants.HttpRequestMethod, *,
          uri: str="/", authority: Optional[str]=None,
          scheme: Optional[str]=None,
          headers: Optional[_HeaderType]=None) -> \
              "writers.HttpRequestWriter":
          """
          Send next request to the server.
          """
          return await self._delegate.write_request(
              method, uri=uri, authority=authority,
              scheme=scheme, headers=headers)