given:
        buildFile << """
            abstract class TaskWithFilesInput extends DefaultTask {

                @InputFiles
                abstract ConfigurableFileCollection getInputFiles()

                @OutputFile
                abstract RegularFileProperty getOutputFile()
            }

            tasks.register('verify', TaskWithFilesInput) {

     *         {@literal @}Input
     *         Property<String> getStringParameter();
     *         {@literal @}InputFiles
     *         ConfigurableFileCollection getInputFiles();
     *     }
     *
     *     void transform(TransformOutputs outputs) {
     *         // ...
     *     }
     * }
     *
     * // Then you can register the action like this:
     *

                @InputFile
                public File getInputFile() {
                    return new File("input.txt");
                }

                @InputFiles
                public Set<File> getInputFiles() {
                    return Collections.emptySet();
                }

                @Input
                public File getFile() {
                    return new File("some-file");
                }