*
     * @param message the message to display
     * @return the password entered by the user
     * @throws PrompterException if an exception occurs
     */
    @Nonnull
    String promptForPassword(@Nullable String message) throws PrompterException;

    /**
     * Displays a message to the user.
     *
     * @param message the message to display
     * @throws PrompterException if an exception occurs

    EnumSet<E> result = EnumSet.allOf(type);
    result.removeAll(collection);
    return result;
  }

  /**
   * Returns a set backed by the specified map. The resulting set displays the same ordering,
   * concurrency, and performance characteristics as the backing map. In essence, this factory
   * method provides a {@link Set} implementation corresponding to any {@link Map} implementation.

     * e.g running mvn site:run will cause Jetty to fail.
     * </p>
     * <p>
     * The resolution is to add -Djava.net.preferIPv4Stack=true to the command line as documented in
     * http://cwiki.apache.org/confluence/display/MAVEN/ConnectException
     * </p>
     */
    @Test
    void testJdk7ipv6() {
        ConnectException connEx = new ConnectException("Connection refused: connect");

                        + pluginDescriptor.getId() + "'. A required class is missing: "
                        + cause.getMessage());
                pluginRealm.display(ps);

                throw new PluginContainerException(mojoDescriptor, pluginRealm, os.toString(), cause);
            } else if (cause instanceof LinkageError) {

        // The exception stack trace is not really interesting here
        // but the message itself may be quite details and span multiple
        // lines with errors in it, so only display it at debug level.
        String msg = "The POM for {} is invalid, transitive dependencies (if any) will not be available: {}";
        if (logger.isDebugEnabled()) {

            // that would happen here should cause the build to fail at a later stage
            // (when actually parsing the POM) and will lead to a better exception being
            // displayed to the user, so just bail out and return false.
        }
        return false;
    }

    public boolean equals(@Nullable Object obj) {
      if (obj instanceof TypeParameterSignature) {
        TypeParameterSignature other = (TypeParameterSignature) obj;
        /*
         * The name is here only for display purposes; <E extends Number> and <T
         * extends Number> are equivalent.
         */
        return bounds.equals(other.bounds);
      }

      return false;
    }

    @Override

    public boolean equals(@Nullable Object obj) {
      if (obj instanceof TypeParameterSignature) {
        TypeParameterSignature other = (TypeParameterSignature) obj;
        /*
         * The name is here only for display purposes; <E extends Number> and <T
         * extends Number> are equivalent.
         */
        return bounds.equals(other.bounds);
      }

      return false;
    }

    @Override

    String ROLE_SEARCH_DEFAULT_PERMISSIONS = "role.search.default.permissions";

    /** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_DEFAULT_DISPLAY_PERMISSIONS = "role.search.default.display.permissions";

    /** The key of the configuration. e.g. {role}guest */
    String ROLE_SEARCH_GUEST_PERMISSIONS = "role.search.guest.permissions";

    public static final String ERRORS_could_not_open_on_system = "{errors.could_not_open_on_system}";

    /** The key of the message: No more results could be displayed. */
    public static final String ERRORS_result_size_exceeded = "{errors.result_size_exceeded}";

    /** The key of the message: {0} file does not exist. */