@Override
    public void characters(char[] ch, int start, int length) throws SAXException {
        if (inMacro) {
            macroBuffer.append(ch, start, length);
        }
    }
Handler for macros in flat open documents
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/odf/FlatOpenDocumentMacroHandler.java