/// <summary>
/// Get a random <see cref="Period"/>. Default 1 week/7 days.
/// </summary>
public Period Period(Period?maximum = null, LocalDateTime?anchor = null, PeriodUnits units = global::NodaTime.PeriodUnits.AllUnits)
{
var anchorTime = anchor ?? LocalDateTime.Now();
var span = maximum ?? global::NodaTime.Period.FromDays(7);
var periodTicks = global::NodaTime.Period.Between(anchorTime, anchorTime + span, global::NodaTime.PeriodUnits.Ticks);
var randomTicks = global::NodaTime.Period.FromTicks(Random.Long(0, periodTicks.Ticks));
return(global::NodaTime.Period.Between(anchorTime, anchorTime + randomTicks, units));
}