});
    }

    @Nullable
    @Override
    public DefaultServiceRegistration<?, ?> findRegistration(Class<?> type, String name) {
        return uncheckedCast(!name.isEmpty() ?
            findByName(name) :
            findByType(type)
        );
    }

    @Override
    public Set<BuildServiceRegistration<?, ?>> findRegistrations(Class<?> type, @Nullable String name) {

      stackWithLastReturnedElementAtTop = null;
    }

    @Override
    public boolean hasNext() {
      return !nextElements.isEmpty();
    }

    @Override
    public boolean hasPrevious() {
      return !previousElements.isEmpty();
    }

    @Override
    public E next() {
      return transferElement(nextElements, previousElements);
    }

    @Override

        return capabilityWithoutVersionToNodes.computeIfAbsent(capabilityId, k -> new LinkedHashSet<>());
    }

    @Override
    public boolean hasConflicts() {
        return !conflicts.isEmpty();
    }

    @Override
    public void resolveNextConflict(Action<ConflictResolutionResult> resolutionAction) {
        CapabilityConflict conflict = conflicts.poll();

        String experimentalProperty = internalOptions.getOption(CACHING_DISABLED_PROPERTY).get();
        if (experimentalProperty != null) {
            if (experimentalProperty.isEmpty() || experimentalProperty.equals("true")) {
                return true;
            }
            List<String> disabledTransformClasses = Arrays.asList(experimentalProperty.split(","));

            classpath = registry.getModule("gradle-daemon-main").getImplementationClasspath();
            searchClassPath = Collections.emptyList();
        }
        if (classpath.isEmpty()) {
            throw new IllegalStateException("Unable to construct a bootstrap classpath when starting the daemon");
        }

        versionValidator.validate(resolvedJvm);

         */
        @Nonnull
        public DependencyResolverRequestBuilder dependency(@Nullable DependencyCoordinate dependency) {
            if (dependency != null) {
                if (this.dependencies.isEmpty()) {
                    this.dependencies = new ArrayList<>();
                }
                this.dependencies.add(dependency);
            }
            return this;
        }

        /**

    void takeSuccessfully() {
      assertEquals(EXPECTED_TAKE, takeUninterruptibly(queue));
      completed.assertCompletionExpected();
      assertTrue(queue.isEmpty());
    }

    private static void scheduleEnableReads(BlockingQueue<String> queue, long countdownInMillis) {
      Runnable toRun = new EnableReads(queue, countdownInMillis);

    }

    /**
     * Informs if there are any batched up conflicts.
     */
    @Override
    public boolean hasConflicts() {
        return !conflicts.isEmpty();
    }

    /**
     * Resolves the conflict by delegating to the conflict resolver who selects single version from given candidates. Executes provided action against the conflict resolution result object.
     */

        for (E e : set2) {
          if (!set1.contains(e)) {
            size++;
          }
        }
        return size;
      }

      @Override
      public boolean isEmpty() {
        return set1.isEmpty() && set2.isEmpty();
      }

      @Override
      public UnmodifiableIterator<E> iterator() {
        return new AbstractIterator<E>() {
          final Iterator<? extends E> itr1 = set1.iterator();

      stackWithLastReturnedElementAtTop = null;
    }

    @Override
    public boolean hasNext() {
      return !nextElements.isEmpty();
    }

    @Override
    public boolean hasPrevious() {
      return !previousElements.isEmpty();
    }

    @Override
    public E next() {
      return transferElement(nextElements, previousElements);
    }

    @Override