Метод clear

dynamic clear(Map map)

Исходный код

static clear(Map map) {
  for (final k in map.keys.toList()) {
    map.remove(k);
  }
}

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Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-collection/Maps/clear.html