allEntriesWithValue method
Return any key:set
entry where the value exists in the set.
If that entry doesn't exist, return null
.
Implementation
Set<MapEntry<K, ISet<V>>> allEntriesWithValue(V value) {
final Set<MapEntry<K, ISet<V>>> entriesWithValue = {};
for (final MapEntry<K, ISet<V>> entry in _mapOfSets.entries) {
final set = entry.value;
if (set.contains(value)) entriesWithValue.add(entry);
}
return entriesWithValue;
}