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Answer a Duration that is ‘factor’ times longer than the receiver
Answer a Duration that is the sum of the receiver and aDuration’s lengths.
Answer a Duration that is the difference of the receiver and aDuration’s lengths.
If the parameter is a Duration, answer the ratio between the receiver and factorOrDuration. Else divide the receiver by factorOrDuration (a Number) and answer a new Duration that is correspondingly shorter.
Answer a Duration that is as long as the receiver, but always in the future.
Answer the number of days in the receiver
Answer whether the receiver correspond to a duration of zero seconds.
Answer a Duration that is as long as the receiver, but with past and future exchanged.
Answer whether the receiver is in the past.
Answer whether the receiver is a zero-second duration or is in the future.
Print a represention of the receiver on aStream.