*     <i>(optional specific exception)</i>
   * @throws IOException if an I/O error occurs
   */
  public static ImmutableList<Path> listFiles(Path dir) throws IOException {
    try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
      return ImmutableList.copyOf(stream);
    } catch (DirectoryIteratorException e) {
      throw e.getCause();

    // First listing should hit the server
    long start1 = System.currentTimeMillis();
    SmbFile[] files1 = dir.listFiles();
    long time1 = System.currentTimeMillis() - start1;
    
    // Second listing should use cache (much faster)
    long start2 = System.currentTimeMillis();
    SmbFile[] files2 = dir.listFiles();
    long time2 = System.currentTimeMillis() - start2;
    
    assertEquals(files1.length, files2.length);

        Path dir = fs.getPath("dir");
        assertEquals(6, MoreFiles.listFiles(dir).size());

        method.delete(dir);
        method.assertDeleteSucceeded(dir);

        assertEquals(
            "contents of /dontdelete deleted by delete method " + method,
            3,
            MoreFiles.listFiles(fs.getPath("/dontdelete")).size());
      }
    }
  }

        Path dir = fs.getPath("dir");
        assertEquals(6, MoreFiles.listFiles(dir).size());

        method.delete(dir);
        method.assertDeleteSucceeded(dir);

        assertEquals(
            "contents of /dontdelete deleted by delete method " + method,
            3,
            MoreFiles.listFiles(fs.getPath("/dontdelete")).size());
      }
    }
  }

    private
    fun generateSubprojectsDirectories(): List<File> {
        val subprojectRoots = platformsFolder.asFile.listFiles(File::isDirectory)
            .plus(subprojectsFolder.asFile)
            .plus(testingFolder.asFile)
            .plus(packingFolder.asFile)

        return subprojectRoots.map { it.listFiles(File::isDirectory).asList() }.flatten()
    }

    private
    fun generateSubprojects(): List<GradleSubproject> {

    }

    Map<String, String> get() {
        if (acceptedViolations == null) {
            acceptedViolations = AcceptedApiChanges.parse(
                acceptedViolationsDir.listFiles()
                    .findAll { it.name.endsWith(".json") }
                    .collect { it.text }
            ).toAcceptedChangesMap()
        }
        return acceptedViolations
    }

    @Override
    void transform(TransformOutputs outputs) {
        File artifactFile = artifact.get().asFile
        if (artifactFile.name == 'gradle-dependencies') {
            (artifactFile.listFiles() as List<File>).sort { it.name }.each {
                outputs.file(it)
            }
        }
    }

    abstract val apiChangesDirectory: DirectoryProperty

    protected
    fun loadChanges(): Map<File, List<AcceptedApiChange>> {
        return apiChangesDirectory.get().asFile.listFiles()
            ?.filter {
                it.name.endsWith(".json")
            }?.associate {
                it to it.readAcceptedChanges()
            }?.filterValues {
                it.acceptedApiChanges != null

                    if (r < 0.333) {
                        f.exists();
                        //                      System.out.print('e');
                    } else if (r < 0.667) {
                        d.listFiles();
                        //                      System.out.print('l');
                    } else if (r < 1.0) {
                        final InputStream in = f.getInputStream();

    @Override
    void transform(TransformOutputs outputs) {
        File baselineJarsDirectory = artifact.get().asFile
        if (baselineJarsDirectory.name == 'gradle-jars') {
            baselineJarsDirectory.listFiles().each {
                outputs.file(it)
            }
        }
    }