Returns a new Duration
representing this Duration
negated.
The returned Duration
has the same length as this one, but will have the opposite sign of this one.
// Using subtraction helps dart2js avoid negative zeros. Duration operator -() => new Duration._microseconds(0 - _duration);
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-core/Duration/operator_unary_minus.html