rollingDuration
(DOC) Calculates the sum of durations of objects in a range leading the current time.
This returns a real profile that equals, at each time t, the duration of objects in the interval [t, t+range].
Real profiles can't actually represent durations, only unitless numbers, so the result is actually calculated as a multiple of the provided unit.
Parameters
range
how far into the future to look
unit
the time basis vector of the result; the unit of time that the result counts.