Interface DateFormatter

interface DateFormatter {
    formatRangeToParts(
        start: ZonedMarker,
        end: ZonedMarker,
        context: DateFormattingContext,
    ): DateTimeRangeFormatPartWithWeek[];
    formatToParts(
        date: ZonedMarker,
        context: DateFormattingContext,
    ): DateTimeFormatPartWithWeek[];
}