A Map is a dynamic collection . In other words, Maps can grow and shrink at runtime. Maps can be declared in two ways − Using Map Literals. Using a Map constructor.
What is Map () in flutter?
Map<K, V> class Null safety. A collection of key/value pairs, from which you retrieve a value using its associated key . There is a finite number of keys in the map, and each key has exactly one value associated with it.