import org.gradle.api.tasks.Optional;
import java.io.File;

public class SomeTask extends DefaultTask {
    private $type v;
    @Input
    public $type getV() { return v; }
    void setV($type v) { this.v = v; }

    File d;
    @OutputDirectory
    public File getD() { return d; }

    @TaskAction
    public void go() { }
}
"""

        buildFile << """