code: public static synchronized void
  setDefaultCache(Cache cache, int dclass) {
  	DClass.check(dclass);
  	defaultCaches.put(Mnemonic.toInteger(dclass), cache);
  }
docs: Sets the Cache to be used as the default for the specified class by future
  Lookups.
  @param cache The default cache for the specified class.
  @param dclass The class whose cache is being set.