public final Dur negate() {
        final Dur negated = new Dur(days, hours, minutes, seconds);
        negated.weeks = weeks;
        negated.negative = !negative;
        return negated;
    }
public final Dur negate ( ) { final Dur negated = new Dur ( days , hours , minutes , seconds ) ; negated . weeks = weeks ; negated . negative = ! negative ; return negated ; }
Provides a negation of this instance.
@return a Dur instance that represents a negation of this instance