code: final protected void common_addAlias(Object key, Object[] aliasArray) {
          ValidateUtility.objectNotNull(key, "key", aliasArray, "aliasArray");
          cache.addAlias(
                         key,
                         aliasArray,
                         cache.shouldPull(this.sharingPolicy, key),
                         true);
      }
docs: used by subclasses