TimeSpan.fromUnitAndValue constructor
Creates a new TimeSpan object based on the unit and value entered.
@param units the type of unit to use to create a TimeSpan instance. @param value the number of units to use to create a TimeSpan instance.
Implementation
TimeSpan.fromUnitAndValue(int units, int value) {
this.time = TimeSpan.toMilliseconds(units, value);
}