HashMap.identity factory constructor
HashMap.identity(Creates an unordered identity-based map.
Effectively a shorthand for:
new HashMap<K, V>(equals: identical,
hashCode: identityHashCode)
Source
external factory HashMap.identity();
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-collection/HashMap/HashMap.identity.html