syncContext.acquire(null, Collections.singleton(metadata));

                    if (metadata.getPath() != null && Files.exists(metadata.getPath())) {
                        try (InputStream in = Files.newInputStream(metadata.getPath())) {
                            versioning = new Versioning(
                                    new MetadataStaxReader().read(in, false).getVersioning());

                            /*

                    throwValidationError(messages -> messages.addErrorsFailedToDownloadBadwordFile(GLOBAL), this::asDownloadHtml);
                }
                try (InputStream in = Files.newInputStream(tempFile)) {
                    out.write(in);
                }
            } finally {
                Files.delete(tempFile);
            }
        });
    }

            throws ParserException, IOException {
        try {
            if (extensionsFile != null && Files.exists(extensionsFile)) {
                try (InputStream is = Files.newInputStream(extensionsFile)) {
                    return new CoreExtensionsStaxReader().read(is, true).getExtensions();
                }
            }
            return List.of();
        } catch (XMLStreamException e) {

                    throwValidationError(messages -> messages.addErrorsFailedToDownloadElevateFile(GLOBAL), this::asDownloadHtml);
                }
                try (InputStream in = Files.newInputStream(tempFile)) {
                    out.write(in);
                }
            } finally {
                Files.delete(tempFile);
            }
        });
    }

            return;
        }
        Properties props = new Properties();
        try ( FileChannel ch = FileChannel.open(config, StandardOpenOption.READ);
              InputStream is = Channels.newInputStream(ch) ) {
            props.load(is);

        }
        if ( !props.isEmpty() ) {
            Map<String, String> map = toMap(props);
            String cfgname = fname.substring(0, fname.length() - 5);

            } catch (MalformedURLException e) {
                throw new IllegalStateException(e);
            }
        } else {
            return Files.newInputStream(new File(pluginFile, descriptor).toPath());
        }
    }

    /**
     * Creates a shallow copy of this plugin descriptor.
     */
    @Override
    public PluginDescriptor clone() {

    }

    /*
     * TODO share with DefaultPluginMappingManager.
     */
    protected Metadata readMetadata(File mappingFile) throws RepositoryMetadataReadException {

        try (InputStream in = Files.newInputStream(mappingFile.toPath())) {
            return new Metadata(new MetadataStaxReader().read(in, false));
        } catch (FileNotFoundException e) {

        if (option == NOFOLLOW_LINKS) {
          return false;
        }
      }
      return true;
    }

    @Override
    public InputStream openStream() throws IOException {
      return Files.newInputStream(path, options);
    }

    private BasicFileAttributes readAttributes() throws IOException {
      return Files.readAttributes(
          path,
          BasicFileAttributes.class,

        if (option == NOFOLLOW_LINKS) {
          return false;
        }
      }
      return true;
    }

    @Override
    public InputStream openStream() throws IOException {
      return Files.newInputStream(path, options);
    }

    private BasicFileAttributes readAttributes() throws IOException {
      return Files.readAttributes(
          path,
          BasicFileAttributes.class,

        this.location = location;
        this.substitute = substitute;
    }

    public void load(Path location) throws IOException {
        try (InputStream is = Files.newInputStream(location)) {
            load(is);
        }
    }

    public void load(URL location) throws IOException {
        try (InputStream is = location.openStream()) {
            load(is);
        }