static String getAlias(String s) {
        Matcher matcher = pattern.matcher(s);
        if (!matcher.matches()) {
            throw new IllegalArgumentException("Invalid Syntax, no Alias found in String '" + s + "'. Syntax is ${xxx}");
        }
        return matcher.group(ADDRESS);
    }
Checks whether a given String is a valid OPM Expression, this means
either an Address or an alias ${xxx}.
plc4j/tools/opm/src/main/java/org/apache/plc4x/java/opm/OpmUtils.java