private void checkIndexExpression(PsiExpression indexExpression) {
    final PsiType indexType = myTypeEvaluator.evaluateType(indexExpression);
    if (indexType != null && !TypeConversionUtil.isAssignable(PsiTypes.intType(), indexType)) {
      myLabeler.markFailedConversion(indexType, indexExpression);
    }
  }
private void checkIndexExpression(PsiExpression indexExpression)