class_docstr: Utility class used to wrap an experience.
  
  Instances of this class will allow to get attrbitues setted
  in the original experience, but the `origin_stream` and
  `current_experience` attributes will be overridden.
code: def task_labels(self) -> List[int]:
      return getattr(self.wrapped_exp, "task_labels")
  
imports: from typing import Generic, Iterable, Iterator, List, Optional, TypeVar
  from avalanche.benchmarks.scenarios.generic_scenario import CLExperience, CLScenario, CLStream, SequenceCLStream, SizedCLStream
label_desc: Use image node_id 3 for calling the ExperienceWrapper obj's underlying member method code with example usage: obj.task_labels() and returns: getattr