code: def get(self) -> bytes:
      n = self._size_hint
      buf = bytearray(n)
      off = 0
      while True:
          b = self._q.sync_q.get()
          if b is None:
              self._closed = True
  
              # Unfortunately, we can't use a memory view here, we
              # need to slice/copy buf, since the S3 upload_part API
              # call requires byte or bytearray:
              # Invalid type for parameter Body, value: <memory at 0x7f512801b6d0>, type: <class 'memoryview'>, valid types: <class 'bytes'>, <class 'bytearray'>, file-like object
              if off == len(buf):
                  return buf
              return buf[:off]
  
          k = len(b)
          if k > n - off:
              new_n = n * 2
              while k > new_n - off:
                  new_n *= 2
              new_buf = bytearray(new_n)
              view = memoryview(buf)
              new_buf[:off] = view[:off]
              buf = new_buf
              n = new_n
          assert k <= n - off
  
          buf[off : off + k] = b
          off += k
  
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 2 for calling the BlockingCollect obj's underlying member method code with example usage: obj.get() and returns: buf, buf