code: def async_writable_blocking_collect_pair(
      size_hint: int,
  ) -> Tuple[AsyncQueueWritableStream, BlockingCollect]:
      q: janus.Queue = janus.Queue(maxsize=1)
      blocking_collect = BlockingCollect(q, size_hint)
      async_writable = AsyncQueueWritableStream(q, blocking_collect)
      return async_writable, blocking_collect
  
imports: from typing import BinaryIO, List, Optional, Tuple, Type
  from types import TracebackType
  import abc
  import io
  import os
  import sys
  from concurrent.futures import ThreadPoolExecutor
  import janus
  from hailtop.utils import blocking_to_async
  from .exceptions import UnexpectedEOFError
label_desc: Use image node_id 4 for calling a global function with example usage: async_writable_blocking_collect_pair(size_hint) and returns: async_writable,  blocking_collect