class_docstr: Tests for the annotated queue class
class_docstr_tok: ["Tests","for","the","annotated","queue","class"]
docstr: Test that get_info returns None if there is no active queuing context
docstr_tok: ["Test","that","get_info","returns","None","if","there","is","no","active","queuing","context"]
code: def test_get_info_none(self):
      """Test that get_info returns None if there is no active queuing context"""
      A = qml.RZ(0.5, wires=1)
  
      with AnnotatedQueue() as q:
          q.append(A, inv=True)
  
      assert QueuingManager.get_info(A) is None
  
imports: from multiprocessing.dummy import Pool
  import pytest
  import numpy
  import pennylane
  from pennylane.queuing import AnnotatedQueue, QueuingManager, QueuingError, WrappedObj
label_desc: Use image node_id 8 for calling the TestAnnotatedQueue obj's underlying member method code with example usage: obj.test_get_info_none() without return types