property Temporal.DifferenceOptions.largestUnit
The largest unit to allow in the resulting `Temporal.Duration` object.
Larger units will be "balanced" into smaller units. For example, if
`largestUnit` is `'minute'` then a two-hour duration will be output as a
120-minute duration.
Valid values may include `'year'`, `'month'`, `'week'`, `'day'`,
`'hour'`, `'minute'`, `'second'`, `'millisecond'`, `'microsecond'`,
`'nanosecond'` and `'auto'`, although some types may throw an exception
if a value is used that would produce an invalid result. For example,
`hours` is not accepted by `Temporal.PlainDate.prototype.since()`.
The default is always `'auto'`, though the meaning of this depends on the
type being used.
LargestUnit<T>