return e.getMessage();
        }
    }

    /**
     * Gets the expiration time for thumbnails.
     *
     * @return the expiration time in milliseconds
     */
    public long getExpiry() {
        return expiry;
    }

    /**
     * Sets the expiration time for thumbnails.
     *
     * @param expiry the expiration time in milliseconds (must be positive)

        unfilteredItr.remove();
        return true;
      }
    }
    return false;
  }

  @Override
  public boolean removeAll(Collection<?> c) {
    return Iterables.removeIf(
        multimap.unfiltered().entries(),
        and(multimap.entryPredicate(), valuePredicateOnEntries(in(c))));
  }

  @Override
  public boolean retainAll(Collection<?> c) {
    return Iterables.removeIf(

     *
     * @return message code
     */
    public String getMessageCode() {
        return messageCode;
    }

    /**
     * Returns arguments of a message
     *
     * @return array of arguments
     */
    public Object[] getArgs() {
        return args;
    }

    @Override
    public String getMessage() {
        return message;
    }

    /**

        return 0;
    }

    @Override
    protected int readParametersWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override
    protected int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override
    public String toString() {

        return classpath == null ? null : classpath.iterator();
    }

    // -------------------------------------------------------------------------------------------
    public ClasspathContainer add(ArtifactMetadata md) {
        if (classpath == null) {
            classpath = new ArrayList<>(16);
        }

        classpath.add(md);

        return this;
    }

@Experimental
@Immutable
public interface ArtifactCoordinates {
    /**
     * {@return the group identifier of the artifact}.
     */
    @Nonnull
    String getGroupId();

    /**
     * {@return the identifier of the artifact}.
     */
    @Nonnull
    String getArtifactId();

    /**
     * Returns the classifier of the artifact.
     *
     * @return the classifier or an empty string if none, never {@code null}
     */

        return null;
    }

    /**
     * Converts a package name to a directory name and returns it.
     *
     * @param packageName
     *            The package name.
     * @return The directory name.
     */
    protected static String toDirectoryName(final String packageName) {
        if (StringUtil.isEmpty(packageName)) {
            return null;
        }

    }
    if (exceptions.size() == 1) {
      Throwable temp = exceptions.iterator().next();
      if (temp instanceof RuntimeException) {
        return (RuntimeException) temp;
      } else {
        return new RuntimeException(temp);
      }
    }
    return new ClusterException(exceptions);
  }

     *
     * @return the unique identifier of type IDTYPE.
     */
    IDTYPE getId();

    /**
     * Sets the unique identifier for the URL queue.
     *
     * @param id the unique identifier to set
     */
    void setId(IDTYPE id);

    /**
     * Retrieves the session ID associated with this URL queue.
     *
     * @return the session ID as a String.
     */

        } catch (InvalidVersionSpecificationException e) {
            return null;
        }

        return artifactFactory.createPluginArtifact(plugin.getGroupId(), plugin.getArtifactId(), versionRange);
    }

    @Override
    public Artifact createProjectArtifact(String groupId, String artifactId, String version) {
        return createArtifact(groupId, artifactId, version, "pom");
    }

    @Override