apache poi read custom property

I have added a custom property to my workbook object like:

((XSSFWorkbook)workBook).getProperties().getCustomProperties().addProperty("fileNameSuffix" , "testName");

Now how can I read it back again.
Why there is no such method as getProperty(String key) ?

I figure a way to do it, but I do not really like it this way

    List<CTProperty> customProperties = workBook.getProperties().getCustomProperties().getUnderlyingProperties().getPropertyList();
    String fileNameSuffix = "";
    for(int i = 0 ; i < customProperties.size() ; i++) {
        CTProperty property = customProperties.get(i);
        if (customProperties.get(i).getName().equals("testName"))
            fileNameSuffix = property.getLpwstr(); // getLpwstr() will return the value of the property
    }