code: def is_closed(self):
      return self._is_closed
  
file_path: metaflow/metaflow/plugins/env_escape/communication/socket_bytestream.py
imports: import errno
  import socket
  import sys
  from .bytestream import ByteStream
  from .utils import __try_op__
label_desc: Use image node_id 7 for calling the SocketByteStream obj's underlying member method code with example usage: obj.is_closed() and returns: self