default String getSystemProperty() {
        String name = name().toLowerCase(Locale.ROOT);
        String prefix = getPrefix().toLowerCase(Locale.ROOT);
        return new StringBuilder(prefix.length() + name.length() + 1).append(prefix).append('_').append(name)
                .toString();
    }
Gets system property for the option.

@return system property
clickhouse-data/src/main/java/com/clickhouse/config/ClickHouseOption.java