method Temporal.PlainYearMonth.prototype.since
#PlainYearMonth.prototype.since(other: ,options?: DifferenceOptions<"year" | "month">,): Temporal.DurationParameters #
#other: optional
#options: DifferenceOptions<"year" | "month">#PlainYearMonth.prototype.since(other: ,options?: DifferenceOptions<"year" | "month">,): Temporal.Duration#other: #options: DifferenceOptions<"year" | "month">