Helper MapTreeEntry

Jan Burse, created Sep 15. 2018
* <p>Implementation of a tree map entry.</p>
* </p>
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final class MapTreeEntry<K, V> extends MapEntry<K, V> {
final static boolean RED = false;
final static boolean BLACK = true;
MapTreeEntry<K, V> left;
MapTreeEntry<K, V> right;
MapTreeEntry<K, V> parent;
boolean color = BLACK;
* <p>Create an entry.</p>
* @param k The key.
* @param v The value.
MapTreeEntry(K k, V v) {
super(k, v);