Open the current base file with the (original) mode and encoding.
        Return the resulting stream.

async def _init_writer(self):
        """
        Open the current base file with the (original) mode and encoding.
        Return the resulting stream.
        """
        async with self._initialization_lock:
            if not self.initialized:
                self.stream = await aiofiles.open(
                    file=self.absolute_file_path,
                    mode=self.mode,
                    encoding=self.encoding,
                    loop=self.loop,
                )