class_docstr: A context aware object that will release the lock file when exiting.
code: def __enter__(self):
      return self.lock
  
imports: import logging
  import time
  from threading import Lock
  from ._error import Timeout
label_desc: Use image node_id 2 for calling the AcquireReturnProxy obj's underlying member method code with example usage: obj.__enter__() and returns: self