Insert an element before this element in this element's linked list.
This entry must be in a linked list when this method is called. The entry
must not be in a linked list.
void insertBefore(E entry) { _list._insertBefore(this, entry, updateFirst: true); }
© 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/insertBefore.html