retainWhere method
Removes all objects from this list that fail to satisfy test
.
An object o
satisfies test
if test(o)
is true.
final numbers = ['one', 'two', 'three', 'four'].notifier;
numbers.retainWhere((item) => item.length == 3);
print(numbers); // [one, two]
The list must be growable.
Implementation
@override
void retainWhere(bool Function(E element) test) {
_updateOnAction(() => value.retainWhere(test));
}