code: def read_bytes(fo):
      """a long followed by that many bytes of data."""
      size = read_long(fo)
      return fo.read(size)
  
file_path: dask/dask/bag/avro.py
imports: from __future__ import annotations
  import io
  import uuid
  from fsspec.core import OpenFile, get_fs_token_paths, open_files
  from fsspec.utils import read_block
  from fsspec.utils import tokenize
  from dask.highlevelgraph import HighLevelGraph
label_desc: Use image node_id 2 for calling a global function with example usage: read_bytes(fo) and returns: fo