public void headerFooter(String text, boolean isHeader, String tagName) {
            if (!includeHeadersFooters) {
                return;
            }
            if (isHeader) {
                headers.add(text);
            } else {
                footers.add(text);
            }
        }
Turns formatted sheet events into HTML
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/ooxml/XSSFExcelExtractorDecorator.java