package edu.stanford.nlp.util;/** *  Internable: Interface for objects which are to be interned. *  Such objects *  should implement weakEquals and weakHashCode methods which are *  used by the Interner to map them.  Note that if an object also *  provides an expensive equals and hashCode, these *will* still be *  used by Java collections. * *  @author Dan Klein *  @version   1/3/01 */public interface Internable {  public boolean weakEquals(Object o);  public int weakHashCode();}