def state = new TaskStateInternal()
    def taskProperties = Stub(TaskProperties) {
        getInputFileProperties() >> ImmutableSortedSet.of()
        getOutputFileProperties() >> ImmutableSortedSet.of()
    }
    def previousState = Stub(PreviousExecutionState) {
        getInputProperties() >> ImmutableSortedMap.of()
        getInputFileProperties() >> ImmutableSortedMap.of()
        getImplementation() >> Stub(ClassImplementationSnapshot)

                inputProperty.getPropertyName(),
                () -> InputParameterUtils.prepareInputParameterValue(inputProperty, task));
        }
        for (InputFilePropertySpec inputFileProperty : taskProperties.getInputFileProperties()) {
            // SkipWhenEmpty implies incremental.
            // If this file property is empty, then we clean up the previously generated outputs.

                );
        }
        Set<String> taskInputs = new LinkedHashSet<>();
        Set<FilteredTree> filteredFileTreeTaskInputs = new LinkedHashSet<>();
        node.getTaskProperties().getInputFileProperties()
            .forEach(spec -> spec.getPropertyFiles().visitStructure(new FileCollectionStructureVisitor() {
                @Override

    @Override
    public ImmutableSortedSet<OutputFilePropertySpec> getOutputFileProperties() {
        return outputFileProperties;
    }

    @Override
    public ImmutableSortedSet<InputFilePropertySpec> getInputFileProperties() {
        return inputFileProperties;
    }

    @Override
    public ImmutableSortedSet<ServiceReferenceSpec> getServiceReferences() {
        return serviceReferences;
    }

    @Override

            addLocalStateFilesToMutations(taskProperties.getLocalStateFiles());
            addDestroyablesToMutations(taskProperties.getDestroyableFiles());

            mutations.hasFileInputs = !taskProperties.getInputFileProperties().isEmpty();
            // piggyback on mutation resolution to declare service references as used services
            task.acceptServiceReferences(taskProperties.getServiceReferences());
        } catch (Exception e) {