class_docstr: Lightweight class that maintains a basic queue of operations, in addition
  to metadata annotations.
docstr: Returns a list of objects in the annotated queue
docstr_tok: ["Returns","a","list","of","objects","in","the","annotated","queue"]
code: def queue(self):
      """Returns a list of objects in the annotated queue"""
      return list(key.obj for key in self.keys())
  
imports: import copy
  from collections import OrderedDict
  from contextlib import contextmanager
  from threading import RLock
  from typing import Optional
label_desc: Use image node_id 8 for calling the AnnotatedQueue obj's underlying member method code with example usage: obj.queue() and returns: list