public Object parseObject(String source, ParsePosition pos) {
        throw new UnsupportedOperationException();
    }
A Format that allows up to 15 significant digits for integers.
This goes against the Microsoft spec, but it preserves information
for long strings of digits.
<p>
This was derived from POI's ExcelGeneralNumberFormat
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/TikaExcelGeneralFormat.java