class_docstr: Rating unification for a rating question
  
  Args:
      question (RatingQuestion): rating question
      strategy (Union[str, RatingQuestionStrategy]): unification strategy. Defaults to "mean".
          mean (str): the mean value of the ratings.
          majority (str): the majority value of the ratings.
          max (str): the max value of the ratings
          min (str): the min value of the ratings
  
  Examples:
      >>> from argilla import RatingQuestion, RatingQuestionUnification, RatingQuestionStrategy
      >>> RatingQuestionUnification(question=RatingQuestion(...), strategy="mean")
      >>> # or use a RatingQuestionStrategy
      >>> RatingQuestionUnification(question=RatingQuestion(...), strategy=RatingQuestionStrategy.MEAN)
code: def strategy_must_be_valid(
      cls, v: Union[str, RatingQuestionStrategy]
  ) -> RatingQuestionStrategy:
      if isinstance(v, str):
          return RatingQuestionStrategy(v)
      return v
  
imports: import random
  from abc import abstractmethod
  from collections import Counter
  from enum import Enum
  from typing import Any, Dict, List, Union
  import pandas
  from argilla.client.feedback.schemas import FeedbackRecord, LabelQuestion, MultiLabelQuestion, RankingQuestion, RatingQuestion, ValueSchema
  from argilla.pydantic_v1 import BaseModel, root_validator, validator
label_desc: Use image node_id 1 for calling the RatingQuestionUnification obj's underlying member method code with example usage: obj.strategy_must_be_valid(cls, v) and returns: v, RatingQuestionStrategy