toConstant("Two Words") == "TWO_WORDS"
        toConstant(" Two  \t words\n") == "TWO_WORDS"
        toConstant("four or so Words") == "FOUR_OR_SO_WORDS"
        toConstant("trailing-") == "TRAILING"
        toConstant("a") == "A"
        toConstant("A") == "A"
        toConstant("aB") == "A_B"
        toConstant("ABC") == "ABC"
        toConstant("ABCThing") == "ABC_THING"
        toConstant("ABC Thing") == "ABC_THING"

            return optsEnvironmentVar;
        }

        if (!GUtil.isTrue(getApplicationName())) {
            return null;
        }

        return GUtil.toConstant(getApplicationName()) + "_OPTS";
    }

    /**
     * The environment variable to use to control exit value (Windows only).
     */
    @Nullable
    @Optional
    @Input

        return builder.toString();
    }

    /**
     * Converts an arbitrary string to upper case identifier with words separated by _. Eg, camelCase -> CAMEL_CASE
     */
    public static String toConstant(CharSequence string) {
        if (string == null) {
            return null;
        }
        return toWords(string, '_').toUpperCase(Locale.ROOT);
    }

    /**

    }

    /**
     * Converts an arbitrary string to upper case identifier with words separated by _. Eg, camelCase -> CAMEL_CASE
     */
    @SuppressWarnings("StringCaseLocaleUsage")
    public static String toConstant(CharSequence string) {
        if (string == null) {
            return null;
        }
        return toWords(string, '_').toUpperCase();
    }

    /**

        map.put(FieldNames.DOC_FREQ, docFreq);
        map.put(FieldNames.USER_BOOST, userBoost);
        map.put(FieldNames.SCORE, (queryFreq + docFreq) * userBoost);
        map.put(FieldNames.TIMESTAMP, timestamp.toInstant().toEpochMilli());
        return map;
    }

    public static SuggestItem parseSource(final Map<String, Object> source) {
        final String text = source.get(FieldNames.TEXT).toString();

            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        } else if (format.contains("date_optional_time")) {
            return DateTimeFormatter.ISO_DATE_TIME.format(date);
        } else {
            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        }
    }

        final BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
        boolQueryBuilder
                .must(QueryBuilders.rangeQuery(FieldNames.TIMESTAMP).lt(time.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli()));

        boolQueryBuilder.must(QueryBuilders.termQuery(FieldNames.KINDS, SuggestItem.Kind.DOCUMENT.toString()));

        return getMavenSession().getRequest().getDegreeOfConcurrency();
    }

    @Nonnull
    @Override
    public Instant getStartTime() {
        return getMavenSession().getRequest().getStartTime().toInstant();
    }

    @Override
    public Path getRootDirectory() {
        return getMavenSession().getRequest().getRootDirectory();
    }

    @Override
    public Path getTopDirectory() {

            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        } else if (format.contains("date_optional_time")) {
            return DateTimeFormatter.ISO_DATE_TIME.format(date);
        } else {
            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        }
    }

            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        } else if (format.contains("date_optional_time")) {
            return DateTimeFormatter.ISO_DATE_TIME.format(date);
        } else {
            return Long.toString(date.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        }
    }