Repository: microsoft/TypeScript
File: src/lib/esnext.intl.d.ts (TypeScript)

Code before:
         */
        getCollations(): string[];
        /**
         * Returns a list of one or more unique hour cycle identifiers for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getHourCycles)
         */
        getHourCycles(): string[];
        /**
         * Returns a list of one or more unique numbering system identifiers for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getNumberingSystems)
         */
        getNumberingSystems(): string[];
        /**
         * Returns the ordering of characters indicated by either ltr (left-to-right) or by rtl (right-to-left) for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo)
         */
        getTextInfo(): TextInfo;
        /**
         * Returns a list of supported time zones for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTimeZones)
         */
        getTimeZones(): string[];
        /**
         * Returns a `WeekInfo` object with the properties `firstDay`, `weekend` and `minimalDays` for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getWeekInfo)
         */
        getWeekInfo(): WeekInfo;
    }

    /**
     * An object representing text typesetting information associated with the Locale data specified in UTS 35's Layouts Elements.
     *
     * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo#return_value)
     */
    interface TextInfo {
        /**
         * A string indicating the direction of text for the locale. Can be either "ltr" (left-to-right) or "rtl" (right-to-left).
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo#direction)
         */
        direction: "ltr" | "rtl";
    }

    /**
     * An object representing week information associated with the Locale data specified in UTS 35's Week Elements.
     *

Review comment (suggestion):
```suggestion
        getTimeZones(): string[] | undefined;
```

Code after:
         */
        getCollations(): string[];
        /**
         * Returns a list of one or more unique hour cycle identifiers for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getHourCycles)
         */
        getHourCycles(): string[];
        /**
         * Returns a list of one or more unique numbering system identifiers for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getNumberingSystems)
         */
        getNumberingSystems(): string[];
        /**
         * Returns the ordering of characters indicated by either ltr (left-to-right) or by rtl (right-to-left) for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo)
         */
        getTextInfo(): TextInfo;
        /**
         * Returns a list of supported time zones for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTimeZones)
         */
        getTimeZones(): string[] | undefined;
        /**
         * Returns a `WeekInfo` object with the properties `firstDay`, `weekend` and `minimalDays` for this locale.
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getWeekInfo)
         */
        getWeekInfo(): WeekInfo;
    }

    /**
     * An object representing text typesetting information associated with the Locale data specified in UTS 35's Layouts Elements.
     *
     * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo#return_value)
     */
    interface TextInfo {
        /**
         * A string indicating the direction of text for the locale. Can be either "ltr" (left-to-right) or "rtl" (right-to-left).
         *
         * [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/getTextInfo#direction)
         */
        direction?: "ltr" | "rtl";
    }

    /**
     * An object representing week information associated with the Locale data specified in UTS 35's Week Elements.
     *