toMap method
Converts to a Map.
Note that the implementation is efficient: it returns a copy-on-write
wrapper around the data from this BuiltMap
. So, if no mutations are
made to the result, no copy is made.
This allows efficient use of APIs that ask for a mutable collection but don't actually mutate it.
Implementation
Map<K, V> toMap() => CopyOnWriteMap<K, V>(_map, _mapFactory);