User u = user;
        for (final AuthenticationChain chain : chains) {
            u = chain.load(u);
        }
        return u;
    }

    /**
     * Adds an authentication chain to the manager.
     * @param chain The authentication chain to add.
     */
    public void addChain(final AuthenticationChain chain) {
        chains = ArrayUtils.addAll(chains, chain);
    }

    /**

     *     chain.proceed(chain.request())
     * }
     * ```
     */
    inline operator fun invoke(crossinline block: (chain: Chain) -> Response): Interceptor = Interceptor { block(it) }
  }

  interface Chain {
    fun request(): Request

    @Throws(IOException::class)
    fun proceed(request: Request): Response

    /**

     */
    public Comparator<MavenProject> getComparator() {
        return comparator;
    }

    /**
     * Gets the calculated weight for a project, representing its dependency chain length.
     *
     * @param project the project
     * @return the project's weight (higher means longer dependency chain)
     */

        FilterChain chain = createDefaultFilterChain();
        for (final Filter element : filterList) {
            chain = appendFilterChain(element, chain);
        }
        filterChain = chain;
    }

    /**
     * Appends a filter to an existing filter chain.
     *
     * @param filter the filter to append
     * @param chain the existing filter chain to append to

class LoggingInterceptor implements Interceptor {
  @Override public Response intercept(Interceptor.Chain chain) throws IOException {
    Request request = chain.request();

    long t1 = System.nanoTime();
    logger.info(String.format("Sending request %s on %s%n%s",
        request.url(), chain.connection(), request.headers()));

    Response response = chain.proceed(request);

    long t2 = System.nanoTime();

            }
        }

        @Override
        public int hashCode() {
            return this.keys.hashCode();
        }
    }

    /**
     * chains a collection of {@link WorkspaceReader}s
     * @param workspaceReaderCollection the collection of readers, might be empty but never <code>null</code>

     * @return create cancel request
     */
    CommonServerMessageBlockRequest createCancel();

    /**
     * Checks if chaining is allowed with the next request.
     *
     * @param next the next request in the chain
     * @return whether to allow chaining
     */
    boolean allowChain(CommonServerMessageBlockRequest next);

    /**
     * Sets the tree ID.
     *
     * @param t the tree ID to set
     */

    /**
     * Checks if this is a cancel request.
     *
     * @return whether this is a cancel request
     */
    boolean isCancel();

    /**
     * Gets the next request in the chain.
     *
     * @return chained request
     */
    Request getNext();

    /**
     * Gets the response for this request.
     *
     * @return the response for this request
     */
    Response getResponse();

        comparator = new SmartProjectComparator(dependencyGraph);
    }

    @Test
    void testProjectWeightCalculation() {
        // Test that projects with longer downstream chains get higher weights
        // Graph: A -> B,C; B -> X,Y; C -> X,Z
        MavenProject projectA = ProjectDependencyGraphStub.A;
        MavenProject projectB = ProjectDependencyGraphStub.B;

    /**
     * Sets an exception for this response.
     *
     * @param e the exception to set
     */
    void exception(Exception e);

    /**
     * Gets the next response in the chain.
     *
     * @return chained response
     */
    Response getNextResponse();