String myParseCOSString() {
            try {
                COSString cosString = parseCOSString();
                if (cosString != null) {
                    return cosString.getString();
                }
            } catch (IOException e) {
                //swallow
            }
            return null;
        }
@return parsed string or null if something went wrong.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-pdf-module/src/main/java/org/apache/tika/parser/pdf/PDFEncodedStringDecoder.java