question: static ChronoZonedDateTimeImpl < ? > ofInstant ( Chronology chrono , Instant instant , ZoneId zone ) { ZoneRules rules = zone . getRules ( ) ; ZoneOffset offset = rules . getOffset ( instant ) ; Objects . requireNonNull ( offset , "offset" ) ; LocalDateTime ldt = LocalDateTime . ofEpochSecond ( instant . getEpochSecond ( ) , instant . getNano ( ) , offset ) ; ChronoLocalDateTimeImpl < ? > cldt = ( ChronoLocalDateTimeImpl < ? > ) chrono . localDateTime ( ldt ) ; return new ChronoZonedDateTimeImpl < > ( cldt , offset , zone ) ; }
target:  Obtains an instance from an instant using the specified time-zone.