package annotations.util.coll;
/**
* A {@link Keyer} supplies keys for the elements of a {@link KeyedSet}.
* @param <K> the key type
* @param <V> the element type
*/
public interface Keyer<K, V> {
/**
* Returns the key that this keyer wishes to assign to the element
* <code>v</code>.
*/
public abstract K getKeyFor(V v);
}