flatten method
Return a flattened iterable of <K, V> entries (including eventual duplicates),
where each entry is a key:value pair.
For example, if the map is {1: {a, b}, 2: {x, y}}
,
it will return (1:a), (1:b), (2:x), (2:y)
.
Implementation
Iterable<MapEntry<K, V>> flatten() sync* {
for (MapEntry<K, ISet<V>> entry in _mapOfSets.entries) {
for (V value in entry.value) {
yield MapEntry<K, V>(entry.key, value);
}
}
}