*/
    boolean storedInGroupDirectory();

    String getGroupId();

    String getArtifactId();

    String getBaseVersion();

    Object getKey();

    /**
     * Get the filename of this metadata on the local repository.
     *
     * @param repository the remote repository it came from
     * @return the filename
     */

    public void setCreatedTime(Long value) {
        registerModifiedProperty("createdTime");
        this.createdTime = value;
    }

    public String getKey() {
        checkSpecifiedProperty("key");
        return convertEmptyToNull(key);
    }

    public void setKey(String value) {
        registerModifiedProperty("key");
        this.key = value;
    }

    public String getValue() {

    @Override
    public String getBaseVersion() {
        // Don't want the artifact's version in here, as this is stored in the directory above that
        return null;
    }

    @Override
    public Object getKey() {
        return "artifact " + artifact.getGroupId() + ":" + artifact.getArtifactId();
    }

    @Override
    public boolean isSnapshot() {

                    for (Object object : elements) {
                      Entry<TypeToken, Object> entry = (Entry<TypeToken, Object>) object;
                      map.putInstance(entry.getKey(), entry.getValue());
                    }
                    return (Map) map;
                  }
                })
            .named("MutableTypeToInstanceMap")
            .withFeatures(

    void setLink(String link);

    /**
     * Get the cache key for this referral
     *
     * @return cache key
     */
    String getKey();

    /**
     * Set the cache key for this referral
     *
     * @param key
     *            cache key
     */
    void setKey(String key);

    /**
     * Set the cache map for this referral
     *
     * @param map the cache map to associate with this referral

        }
        this.key = Arrays.copyOf(key, LEASE_KEY_SIZE);
    }

    /**
     * Get the lease key bytes
     *
     * @return copy of the 16-byte lease key
     */
    public byte[] getKey() {
        return Arrays.copyOf(key, LEASE_KEY_SIZE);
    }

    /**
     * Write the lease key to a buffer
     *
     * @param dst destination buffer
     * @param dstIndex starting index in destination buffer

        Entry<? extends K, ? extends V> entry = getOnlyElement(map.entrySet());
        return ImmutableMap.of(entry.getKey(), entry.getValue());
      default:
        Map<K, V> orderPreservingCopy = Maps.newLinkedHashMap();
        for (Entry<? extends K, ? extends V> e : map.entrySet()) {
          orderPreservingCopy.put(checkNotNull(e.getKey()), checkNotNull(e.getValue()));
        }
        return new RegularImmutableMap<K, V>(orderPreservingCopy);

      return new WrappedSortedSet(
          getKey(),
          getSortedSetDelegate().headSet(toElement),
          (getAncestor() == null) ? this : getAncestor());
    }

    @Override
    public SortedSet<V> subSet(@ParametricNullness V fromElement, @ParametricNullness V toElement) {
      refreshIfEmpty();
      return new WrappedSortedSet(
          getKey(),

        return packages;
    }

    /**
     * The key that can be used to identify the configuration using the
     * {@link javax.inject.Named} annotation.
     */
    public String getKey() {
        return key;
    }

    /**
     * Returns the configuration for this extension.
     */
    public XmlNode getConfiguration() {
        return configuration;
    }

            when(mockReferralData.getKey()).thenReturn(key);
            doNothing().when(mockReferralData).setKey(key);

            mockReferralData.setKey(key);
            String retrievedKey = mockReferralData.getKey();

            assertEquals(key, retrievedKey);
            verify(mockReferralData, times(1)).setKey(key);
            verify(mockReferralData, times(1)).getKey();