getWhere method
get where
Implementation
Map<K, V> getWhere(bool Function(K key, V value) f) {
final map = <K, V>{};
for (final element in entries) {
final key = element.key;
final value = element.value;
if (f(key, value)) {
map.putIfAbsent(key, () => value);
}
}
return map;
}