addAll method
As Map.addAll.
Implementation
void addAll(Map<K, V> other) {
_checkKeys(other.keys);
_checkValues(other.values);
_safeMap.addAll(other);
}
As Map.addAll.
void addAll(Map<K, V> other) {
_checkKeys(other.keys);
_checkValues(other.values);
_safeMap.addAll(other);
}