}

    @Override
    public Collection<IncludedBuildState> getIncludedBuildsForPluginResolution() {
        BuildState thisBuild = gradle.getOwner();
        return buildRegistry.getIncludedBuilds().stream().filter(build ->
            build != thisBuild && !build.isImplicitBuild() && !build.isPluginBuild()
        ).collect(Collectors.toList());
    }

    @Override

     */
    RootBuildState getRootBuild() throws IllegalStateException;

    /**
     * Returns all included builds.
     */
    Collection<? extends IncludedBuildState> getIncludedBuilds();

    /**
     * Locates an included build by {@link BuildIdentifier}, if present. Fails if not an included build.
     */

import org.gradle.test.fixtures.AbstractProjectBuilderSpec
import org.gradle.util.Path

class DefaultTaskSelectorTest extends AbstractProjectBuilderSpec {
    def buildStateRegistry = Stub(BuildStateRegistry) {
        getIncludedBuilds() >> []
    }
    def projectModel1 = Stub(ProjectInternal)
    def project1 = project(":a", projectModel1)
    def resolver = Mock(TaskNameResolver)
    def projectConfigurer = Mock(ProjectConfigurer)

        delegate.useLogger(logger)

    override fun getGradle(): Gradle =
        delegate.gradle

    override fun getSharedServices() = delegate.sharedServices

    override fun getIncludedBuilds(): MutableCollection<IncludedBuild> =
        delegate.includedBuilds

    override fun includedBuild(name: String): IncludedBuild =
        delegate.includedBuild(name)

        }
        return children;
    }

    private List<Path> calculateIncludedBuildIdentityPaths() {
        Collection<? extends IncludedBuildState> includedBuilds = getBuildStateRegistry().getIncludedBuilds();
        List<Path> includedBuildIdentityPaths = new ArrayList<>(includedBuilds.size());
        for (IncludedBuildState includedBuild : includedBuilds) {

        }
        throw new IllegalStateException("No built-in tasks available.");
    }

    private BuildState findIncludedBuild(File rootDir) {
        for (IncludedBuildState build : buildRegistry.getIncludedBuilds()) {
            if (build.getRootDirectory().equals(rootDir)) {
                return build;
            }
        }
        return null;
    }

            includedBuild = registerBuild(buildDefinition, true, null);
        }
        return includedBuild;
    }

    @Override
    public Collection<IncludedBuildState> getIncludedBuilds() {
        return includedBuildsByRootDir.values();
    }

    @Override
    public IncludedBuildState getIncludedBuild(BuildIdentifier buildIdentifier) {

    override fun useLogger(logger: Any) =
        delegate.useLogger(logger)

    override fun getSharedServices(): BuildServiceRegistry =
        delegate.sharedServices

    override fun getIncludedBuilds(): MutableCollection<IncludedBuild> =
        delegate.includedBuilds

    override fun includedBuild(name: String): IncludedBuild =
        delegate.includedBuild(name)

     * @since 6.1
     */
    BuildServiceRegistry getSharedServices();

    /**
     * Returns the included builds for this build.
     *
     * @since 3.1
     */
    Collection<IncludedBuild> getIncludedBuilds();

    /**
     * Returns the included build with the specified name for this build.
     *
     * @throws UnknownDomainObjectException when there is no build with the given name
     * @since 3.1
     */

The included builds are accessed using link:{groovyDslPath}/org.gradle.api.invocation.Gradle.html#org.gradle.api.invocation.Gradle:includedBuilds[Gradle.getIncludedBuilds()] or link:{groovyDslPath}/org.gradle.api.invocation.Gradle.html#org.gradle.api.invocation.Gradle:includedBuild(java.lang.String)[Gradle.includedBuild(java.lang.String)], and a task reference is obtained via the link:{groovyDslPath}/org.grad...