public interface Map206<K, V>
{
    public int size();
    public boolean isEmpty();
    public void clear();
    
    public boolean containsKey(K key);    
    public boolean containsValue(V value);

    public V get(K key);
    public V put(K key, V value);
    public V remove(K key);
 
 
    public Iterable<K> keySet();
    public Iterable<V> values();
    public Iterable<MEntry<K, V>> entrySet();

}