containsKey method

bool containsKey (
  1. Object? key
)

Whether this map contains the given key.

Returns true if any of the keys in the map are equal to key according to the equality used by the map.

Implementation

bool containsKey(Object? key);

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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-core/Map/containsKey.html