protected void configureExtractor(POIXMLTextExtractor extractor, Locale locale) {
        ((XSSFEventBasedExcelExtractor) extractor)
                .setIncludeTextBoxes(config.isIncludeShapeBasedContent());
        ((XSSFEventBasedExcelExtractor) extractor).setFormulasNotResults(false);
        ((XSSFEventBasedExcelExtractor) extractor).setLocale(locale);
        //given that we load our own shared strings table, setting:
        //((XSSFEventBasedExcelExtractor)extractor).setConcatenatePhoneticRuns();
        //does no good here.
    }
Allows access to headers/footers from raw xml strings
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/ooxml/XSSFExcelExtractorDecorator.java