if (taskBuilder == null) {
            throw new IllegalStateException("You must specify the task which will contribute classes from this source directory");
        }
        SourceDirectorySet langSrcDir = project.getObjects().sourceDirectorySet(name, description == null ? "Sources for " + name : description);
        langSrcDir.srcDir(project.getLayout().getProjectDirectory().dir("src/" + sourceSet.getName() + "/" + name));

                <td><literal><replaceable>sourceSet</replaceable>.<replaceable>sourceDirectorySet</replaceable>.destinationDirectory</literal></td>
            </tr>
            <tr>
                <td>destinationDir</td>
                <td><literal><replaceable>sourceSet</replaceable>.<replaceable>sourceDirectorySet</replaceable>.destinationDirectory</literal></td>
            </tr>
            <tr>

            configure(_) >> { it[0].execute(compileTask) }
            get() >> compileTask
            flatMap(_) >> objectFactory().directoryProperty()
        }
        def allJava = Mock(SourceDirectorySet)
        def allSource = Mock(SourceDirectorySet)
        def classesTask = Mock(Task)
        def classesTaskProvider = Stub(TaskProvider) {
            configure(_) >> { it[0].execute(classesTask) }
            get() >> classesTask

package gradlebuild.basics.accessors

import org.gradle.api.Project
import org.gradle.api.file.SourceDirectorySet

import org.gradle.kotlin.dsl.*
import org.jetbrains.kotlin.gradle.dsl.KotlinJvmProjectExtension


// TODO these accessors should be generated - https://github.com/gradle/gradle/issues/3191

val Project.kotlinMainSourceSet: SourceDirectorySet

 * limitations under the License.
 */

package org.gradle.api.tasks;

import org.gradle.api.file.SourceDirectorySet;

/**
 * Represents a Groovy source set.
 *
 * @since 7.1
 */
public interface GroovySourceDirectorySet extends SourceDirectorySet {

import spock.lang.TempDir

class SourceFoldersCreatorTest extends Specification {

    @TempDir
    File tempFolder;

    SourceSet sourceSet;
    SourceDirectorySet java
    SourceDirectorySet resources
    SourceDirectorySet allSource

    DirectoryTree javaTree;
    DirectoryTree resourcesTree;
    File projectRootFolder;
    File defaultOutputFolder;
    File baseSourceOutputFolder;

            </tr>
            <tr>
                <td>annotationProcessorGeneratedSourcesDirectory</td>

 * limitations under the License.
 */

package org.gradle.nativeplatform;

import org.gradle.api.DomainObjectSet;
import org.gradle.api.Incubating;
import org.gradle.api.Named;
import org.gradle.api.file.SourceDirectorySet;

/**
 * A library component that is not built by gradle.
 */
@Incubating
public interface PrebuiltLibrary extends Named, NativeLibrary {
    /**

 * limitations under the License.
 */

package org.gradle.kotlin.dsl.provider

import org.gradle.api.JavaVersion
import org.gradle.api.Project
import org.gradle.api.file.SourceDirectorySet
import org.gradle.api.provider.Provider

import java.io.File


/**
 * Protocol between `:kotlin-dsl-plugins` and `:kotlin-dsl-provider-plugins`.
 *

            task.getPrecompiledGroovyScriptsOutputDirectory().convention(buildDir.dir("groovy-dsl-plugins/output/plugin-classes"));

            SourceDirectorySet javaSource = pluginSourceSet.getJava();
            SourceDirectorySet groovySource = pluginSourceSet.getExtensions().getByType(GroovySourceDirectorySet.class);