class_docstr: Channel is a higher level abstraction over a low-level bytestream.
  
  You can send and receive JSON serializable object directly with this interface
  
  For now this class does not do much, but we could imagine some sort compression or other
  transformation being added here
code: def __init__(self, stream):
      self._stream = stream
      self._fmt = struct.Struct("<I")
  
file_path: metaflow/metaflow/plugins/env_escape/communication/channel.py
imports: import json
  import struct
  import traceback
label_desc: Use image node_id 1 to create a new Channel object from inherited base classes: object with example: obj = Channel(stream)