@Deprecated
  @ApiStatus.ScheduledForRemoval
  default PsiExpression getCaseValue() {
    PsiExpressionList expressionList = getCaseValues();
    if (expressionList != null) {
      PsiExpression[] expressions = expressionList.getExpressions();
      if (expressions.length == 1) {
        return expressions[0];
      }
    }
    return null;
  }
@Deprecated
  @ApiStatus.ScheduledForRemoval
  default PsiExpression getCaseValue()