putIfAbsent method
V
putIfAbsent(
- K key,
- V ifAbsent()
As Map.putIfAbsent.
Implementation
V putIfAbsent(K key, V Function() ifAbsent) {
_checkKey(key);
return _safeMap.putIfAbsent(key, () {
var value = ifAbsent();
_checkValue(value);
return value;
});
}