method Temporal.PlainDate.prototype.add
#PlainDate.prototype.add(durationLike: ,options?: ArithmeticOptions,): Temporal.PlainDateParameters #
#durationLike: optional
#options: ArithmeticOptions#PlainDate.prototype.add(durationLike: ,options?: ArithmeticOptions,): Temporal.PlainDate#durationLike: #options: ArithmeticOptions