// Build effective model
        ModelBuilderRequest request = ModelBuilderRequest.builder()
                .session(session)
                .source(Sources.buildSource(tempPomPath))
                .requestType(ModelBuilderRequest.RequestType.BUILD_EFFECTIVE)
                .recursive(false) // We only want this POM, not its modules
                .build();

     */
    @Nonnull
    default Optional<OutputStream> stdErr() {
        return Optional.ofNullable(parserRequest().stdErr());
    }

    /**
     * Returns a list of core extensions from all sources, that were discovered and loaded. Each instance of
     * {@link CoreExtensions} is validated, but the list elements may have overlapping elements, that requires
     * some logic to sort out (like precedence).
     * <p>

    }

    // These methods deal with construction intact Plugin object that look like they come from a standard
    // <plugin/> block in a Maven POM. We have to do some wiggling to pull the sources of information
    // together and this really shows the problem of constructing a sensible default configuration, but
    // it's all encapsulated here so it appears normalized to the POM builder.

  in terms of user-provided configuration from properties or the POM).
  If these mojos are to be first-class components, the configuration from these
  various sources must be consolidated and injected using the container.

  Currently, mojo configuration is done externally to the container, in the
  DefaultPluginManager in the maven-core API. In order to get from here to

    }

    // These methods deal with construction intact Plugin object that look like they come from a standard
    // <plugin/> block in a Maven POM. We have to do some wiggling to pull the sources of information
    // together and this really shows the problem of constructing a sensible default configuration, but
    // it's all encapsulated here so it appears normalized to the POM builder.

application/x-ustar            ustar            # Ustar file
application/vnd.ms-access      mdb mda mde      # MS Access
application/vnd.ms-project     mpp              # MS Project
application/x-wais-source      src              # WAIS Sources
application/zip                zip jar          # ZIP Compressed File
audio/basic                    au snd           # Audio Sound File
audio/x-aiff                   aif aiff aifc    # AIFF Sound File

                                ? Sources.fromPath(installationToolchainsFile)
                                : null)
                .userToolchainsSource(
                        userToolchainsFile != null && Files.isRegularFile(userToolchainsFile)
                                ? Sources.fromPath(userToolchainsFile)
                                : null)
                .build();

        assertEquals("java", md.getLanguage());
        assertEquals("per-lookup", md.getInstantiationStrategy());
        assertEquals("some-goal", md.getExecuteGoal());
        assertEquals("generate-sources", md.getExecutePhase());
        assertEquals("cobertura", md.getExecuteLifecycle());
        assertEquals("2.2", md.getSince());
        assertEquals("deprecated-mojo", md.getDeprecated());

        </configuration>
        <executions>
          <execution>
            <id>model-v3</id>
            <goals>
              <goal>velocity</goal>
            </goals>
            <phase>generate-sources</phase>
            <configuration>
              <version>4.0.99</version>
              <templates>
                <template>model-v3.vm</template>
              </templates>
            </configuration>

    toAddress: InetAddress,
    source: BufferedSource,
    sink: BufferedSink,
  ) {
    executor.execute {
      val name = "SocksProxy $fromAddress to $toAddress"
      threadName(name) {
        val buffer = Buffer()
        try {
          sink.use {
            source.use {
              while (true) {
                val byteCount = source.read(buffer, 8192L)