type                | target    | value
        TaskWithInputFile   | 'inputs'  | [null] as Object[]
        TaskWithOutputFile  | 'outputs' | [null] as Object[]
        TaskWithOutputFiles | 'outputs' | [null] as Object[]
        TaskWithOutputFiles | 'outputs' | [] as List
        TaskWithInputFiles  | 'inputs'  | [null] as Object[]
        TaskWithOutputDir   | 'outputs' | [null] as Object[]

        @OutputFile
        public File getOutputFile() {
            return outputFile;
        }
    }

    public static class TaskWithOutputFiles extends TaskWithAction {
        List<File> outputFiles;

        @Inject
        public TaskWithOutputFiles(List<File> outputFiles) {
            this.outputFiles = outputFiles;
        }

        @OutputFiles
        public List<File> getOutputFiles() {