private final String displayName;
    private final TaskNodeFactory taskNodeFactory;
    private final TaskDependencyResolver dependencyResolver;
    private final ExecutionNodeAccessHierarchy outputHierarchy;
    private final ExecutionNodeAccessHierarchy destroyableHierarchy;
    private final ResourceLockCoordinationService lockCoordinator;
    private Spec<? super Task> filter = Specs.satisfyAll();
    private int order = 0;

public class MissingTaskDependencyDetector {
    private final ExecutionNodeAccessHierarchy outputHierarchy;
    private final ExecutionNodeAccessHierarchies.InputNodeAccessHierarchy inputHierarchy;

    public MissingTaskDependencyDetector(ExecutionNodeAccessHierarchy outputHierarchy, ExecutionNodeAccessHierarchies.InputNodeAccessHierarchy inputHierarchy) {

    private final List<DiagnosticEvent> diagnosticEvents = new ArrayList<>();
    private final String displayName;
    private final ExecutionNodeAccessHierarchy outputHierarchy;
    private final ExecutionNodeAccessHierarchy destroyableHierarchy;
    private final ResourceLockCoordinationService lockCoordinator;
    private final Action<ResourceLock> resourceUnlockListener = this::resourceUnlocked;

    private DefaultExecutionPlan newExecutionPlan() {
        return new DefaultExecutionPlan(Path.ROOT.toString(), taskNodeFactory, new OrdinalGroupFactory(), dependencyResolver, new ExecutionNodeAccessHierarchy(CASE_SENSITIVE, Stub(Stat)), new ExecutionNodeAccessHierarchy(CASE_SENSITIVE, Stub(Stat)), coordinator)
    }

    def task(String name, Task... dependsOn = []) {
        def mock = createTask(name)
        addDependencies(mock, dependsOn)