map<K2, V2> method

Map<K2, V2> map <K2, V2>(MapEntry<K2, V2> transform(K key, V value))

Returns a new map where all entries of this map are transformed by the given f function.

Implementation 

Map<K2, V2> map<K2, V2>(MapEntry<K2, V2> transform(K key, V value)) =>
    _map.map<K2, V2>(transform);