class FindAddress {

    @VisibleForTesting
    public static MatchResult matchHouseNumber(String content, int offset) {
        if (offset > 0 && HOUSE_PRE_DELIM.indexOf(content.charAt(offset - 1)) == -1) return null;
        Matcher matcher = sHouseNumberRe.matcher(content).region(offset, content.length());
        if (matcher.lookingAt()) {
            MatchResult matchResult = matcher.toMatchResult();
            if (checkHouseNumber(matchResult.group(0))) return matchResult;
        }
        return null;
    }

    private  FindAddress();

}