Solido/fast_immutable_collections
Dart Package: Immutable lists, sets, maps, and multimaps, which are as fast as their native mutable counterparts. Extension methods and comparators for native Dart collections.
DartBSD-2-Clause
Dart Package: Immutable lists, sets, maps, and multimaps, which are as fast as their native mutable counterparts. Extension methods and comparators for native Dart collections.
DartBSD-2-Clause