for (ArtifactRepository repository : repositories) {
            String key = repository.getId();

            List<ArtifactRepository> aliasedRepos = reposByKey.computeIfAbsent(key, k -> new ArrayList<>());

            aliasedRepos.add(repository);
        }

        List<ArtifactRepository> effectiveRepositories = new ArrayList<>();

    }

    fun <T> runCollectingFingerprintForProject(identityPath: Path, action: () -> T): T {
        val previous = projectForThread.get()
        val projectSink = sinksForProject.computeIfAbsent(identityPath) { ProjectScopedSink(host, identityPath, projectScopedWriter) }
        projectForThread.set(projectSink)
        try {
            return action()
        } finally {

      synchronized (mutex) {
        return delegate().replace(key, value);
      }
    }

    @Override
    public V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
      synchronized (mutex) {
        return delegate().computeIfAbsent(key, mappingFunction);
      }
    }

    @Override
    @CheckForNull

    ): BuildStructureOperationProject {
        val childProjects = children.getOrDefault(project.path, emptyList()).map { convertProject(converted, it, rootProjectName, children) }.toSet()
        return converted.computeIfAbsent(project.path) {
            // Root project name is serialized separately, could perhaps move it to this cached project state object
            val projectName = project.path.name ?: rootProjectName

        return propertyBuilders.computeIfAbsent(getter.getName(), methodName -> new PropertyAnnotationMetadataBuilder(propertyName, getter, validationContext));
    }

        for (ArtifactRepository repository : repositories) {
            String key = repository.getId();

            List<ArtifactRepository> aliasedRepos = reposByKey.computeIfAbsent(key, k -> new ArrayList<>());

            aliasedRepos.add(repository);
        }

        List<ArtifactRepository> effectiveRepositories = new ArrayList<>();

    }
    try {
      unmod.replace(3, "four");
      fail("UnsupportedOperationException expected");
    } catch (UnsupportedOperationException expected) {
    }
    try {
      unmod.computeIfAbsent(3, (k) -> k + "three");
      fail("UnsupportedOperationException expected");
    } catch (UnsupportedOperationException expected) {
    }
    try {
      unmod.computeIfPresent(4, (k, v) -> v);

            artifacts.put(getKey(spec.artifact), spec);

            String key = spec.artifact.getDependencyConflictId();
            List<ArtifactVersion> artifactVersions = versions.computeIfAbsent(key, k -> new ArrayList<>());
            if (spec.artifact.getVersion() != null) {
                artifactVersions.add(new DefaultArtifactVersion(spec.artifact.getVersion()));
            }
        }

            this.typeProvider = typeProvider;
        }

        private void putViewFor(Object sourceObject, ViewKey key, Object proxy) {
            Map<ViewKey, WeakReference<Object>> viewsForSource = views.computeIfAbsent(sourceObject,
                new WeakIdentityHashMap.AbsentValueProvider<Map<ViewKey, WeakReference<Object>>>() {
                    @Override
                    public Map<ViewKey, WeakReference<Object>> provide() {

   *
   * @throws UnsupportedOperationException always
   * @deprecated Unsupported operation.
   */
  @Deprecated
  @Override
  @DoNotCall("Always throws UnsupportedOperationException")
  public final V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
    throw new UnsupportedOperationException();
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.
   *