internal ImHashMap <K, V> Update(int hash, K key, V value, Update <V> update)
{
return(Height == 0
? this
: hash == Hash
? ReferenceEquals(Key, key) || Key.Equals(key)
? new ImHashMap <K, V>(
new Data(hash, key, update == null ? value : update(Value, value), Conflicts), Left, Right)
: UpdateValueAndResolveConflicts(key, value, update, true)
: (hash < Hash
? With(Left.Update(hash, key, value, update), Right)
: With(Left, Right.Update(hash, key, value, update)))
.KeepBalance());
}
