public String getHexDumpAsStr() {
        return lines.stream()
                .map(HexDumpLine::getLine)
                .collect(Collectors.joining("\n"));
    }
@return The size of the hex dump when output as a string. Not the
number of chars rendered by the hex dump.
stroom-util-shared/src/main/java/stroom/util/shared/string/HexDump.java