filterKeys method
Filters the map based on a condition applied to its keys.
Example:
var map = {'first': 1, 'second': 2, 'third': 3};
print(map.filterKeys((key) => key.startsWith('f'))); // Output: {'first': 1}
Implementation
Map<K, V> filterKeys(bool Function(K key) predicate) =>
Map.fromEntries(entries.where((entry) => predicate(entry.key)));