Constructs an object representing a duration of time.

This object is used to specify, for example, the time to re-evaluation and timeout on a check or the interval passed to a maintenance pipeline.

Takes an amount and a unit:

• amount is the length of the duration, measured in terms of the unit
• unit is one of :nanos, :micros, :millis, :seconds, :minutes, :hours, :half-days, :days, :weeks, :months, :years, :decades, :centuries, :millennia, :eras or :forever

Note: internally, this constructs a java.time.Duration and is merely a convenience function. As such, a java.time.Duration can be passed directly wherever this function would be used.