protected void handleEmbeddedOfficeDoc(DirectoryEntry dir, String resourceName,
                                           XHTMLContentHandler xhtml, boolean outputHtml)
            throws IOException, SAXException, TikaException {
        handleEmbeddedOfficeDoc(dir, new Metadata(), resourceName, xhtml, outputHtml);
    }
Handle an office document that's embedded at the POIFS level
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/AbstractPOIFSExtractor.java