}

    private TestFile nestedBeanWithAction(TestFile projectDir = temporaryFolder.testDirectory) {
        return projectDir.file("buildSrc/src/main/java/NestedBeanWithAction.java") << """
            import org.gradle.api.tasks.Nested;
            import org.gradle.api.Action;
            import java.io.File;

            public class NestedBeanWithAction {
                private Action<File> action;