See https://pub.dev/packages/quiver instead!
A collection of collection classes for use in Dart.
listsEqual, mapsEqual and setsEqual check collections for equality.
LruMap is a map that removes the least recently used item when a threshold
length is exceeded.
Multimap is an associative collection that maps keys to collections of
values.
BiMap is a bidirectional map and provides an inverse view, allowing
lookup of key by value.
TreeSet is a balanced binary tree that offers a bidirectional iterator,
the ability to iterate from an arbitrary anchor, and 'nearest' search.