private void newSheet() {
            currentSheetIndex++;
            currentSheet = new TreeMap<>(new PointComparator());
        }
Adds a text cell with the given text comment. The given text
is trimmed, and ignored if <code>null</code> or empty.

@param record record that holds the text value
@param text   text content, may be <code>null</code>
@throws SAXException
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/ExcelExtractor.java