Removes all elements in the queue. The size of the queue becomes zero.
void clear() { _sentinel._nextLink = _sentinel; _sentinel._previousLink = _sentinel; _elementCount = 0; }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-collection/DoubleLinkedQueue/clear.html