1. Object?value

Whether this map contains the givenvalue.

Returns true if any of the values in the map are equal tovalueaccording to the== operator.

final moonCount = <String, int>{'Mercury': 0, 'Venus': 0, 'Earth': 1,  'Mars': 2, 'Jupiter': 79, 'Saturn': 82, 'Uranus': 27, 'Neptune': 14};final moons3 = moonCount.containsValue(3); // falsefinal moons82 = moonCount.containsValue(82); // true

Implementation

bool containsValue(Object? value);