dart:collection

HashMap.from factory constructor

HashMap.from(Map other)

Creates a HashMap that contains all key/value pairs of other.

Source

factory HashMap.from(Map other) {
  HashMap<K, V> result = new HashMap<K, V>();
  other.forEach((k, v) {
    result[k as Object/*=K*/] = v as Object/*=V*/;
  });
  return result;
}