property Temporal.DifferenceOptions.roundingIncrement
Allows rounding to an integer number of units. For example, to round to
increments of a half hour, use { smallestUnit: 'minute', roundingIncrement: 30 }.
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numberAllows rounding to an integer number of units. For example, to round to
increments of a half hour, use { smallestUnit: 'minute', roundingIncrement: 30 }.
number