Unlink the element from its linked list.
The entry must currently be in a linked list when this method is called.
void unlink() { _list._unlink(this); }
© 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/LinkedListEntry/unlink.html