How to use the @microsoft/recognizers-text-number.RegExpUtility.getSafeRegExp function in @microsoft/recognizers-text-number

constructor(ci?: CultureInfo) {
        if (!ci) {
            ci = new CultureInfo(Culture.Chinese);
        }

        super(ci);

        this.extractType = Constants.SYS_UNIT_TEMPERATURE;

        this.suffixList = ChineseNumericWithUnit.TemperatureSuffixList;
        this.prefixList = ChineseNumericWithUnit.TemperaturePrefixList;
        this.ambiguousUnitList = ChineseNumericWithUnit.TemperatureAmbiguousValues;

        this.ambiguousUnitNumberMultiplierRegex = RegExpUtility.getSafeRegExp(BaseUnits.AmbiguousUnitNumberMultiplierRegex, "gs");
    }
}

constructor(ci?: CultureInfo) {
        if (!ci) {
            ci = new CultureInfo(Culture.Portuguese);
        }

        super(ci);

        this.extractType = Constants.SYS_UNIT_TEMPERATURE;

        this.suffixList = PortugueseNumericWithUnit.TemperatureSuffixList;
        this.prefixList = new Map();
        this.ambiguousUnitList = new Array();

        this.ambiguousUnitNumberMultiplierRegex = RegExpUtility.getSafeRegExp(BaseUnits.AmbiguousUnitNumberMultiplierRegex, "gs");
    }
}

constructor(ci?: CultureInfo) {
        if (!ci) {
            ci = new CultureInfo(Culture.French);
        }

        super(ci);

        this.extractType = Constants.SYS_UNIT_TEMPERATURE;

        this.suffixList = FrenchNumericWithUnit.TemperatureSuffixList;
        this.prefixList = new Map();
        this.ambiguousUnitList = new Array();

        this.ambiguousUnitNumberMultiplierRegex = RegExpUtility.getSafeRegExp(BaseUnits.AmbiguousUnitNumberMultiplierRegex, "gs");
    }
}

constructor(ci?: CultureInfo) {
        if (!ci) {
            ci = new CultureInfo(Culture.Spanish);
        }

        super(ci);

        this.extractType = Constants.SYS_UNIT_TEMPERATURE;

        this.suffixList = SpanishNumericWithUnit.TemperatureSuffixList;
        this.prefixList = new Map();
        this.ambiguousUnitList = new Array();

        this.ambiguousUnitNumberMultiplierRegex = RegExpUtility.getSafeRegExp(BaseUnits.AmbiguousUnitNumberMultiplierRegex, "gs");
    }
}

constructor(ci?: CultureInfo) {
        if (!ci) {
            ci = new CultureInfo(Culture.English);
        }

        super(ci);

        this.extractType = Constants.SYS_UNIT_TEMPERATURE;

        this.suffixList = EnglishNumericWithUnit.TemperatureSuffixList;
        this.prefixList = new Map();
        this.ambiguousUnitList = EnglishNumericWithUnit.AmbiguousTemperatureUnitList;

        this.ambiguousUnitNumberMultiplierRegex = RegExpUtility.getSafeRegExp(BaseUnits.AmbiguousUnitNumberMultiplierRegex, "gs");
    }
}