filterKeys method
Returns a map containing all key-value pairs with keys matching the given predicate
.
The returned map preserves the entry iteration order of the original map.
Implementation
Map<K, V> filterKeys(bool Function(K) predicate) {
final result = <K, V>{};
for (final entry in entries) {
if (predicate(entry.key)) {
result[entry.key] = entry.value;
}
}
return result;
}