CopyUtil.copy(in, ResourceUtil.getPluginPath(fileName).toFile());
                }
            } catch (final Exception e) {
                throw new PluginException("Failed to install the artifact " + artifact.getName(), e);
            }
        } else {
            try (final InputStream in = new FileInputStream(url)) {
                CopyUtil.copy(in, ResourceUtil.getPluginPath(fileName).toFile());

     * @return the path to the JAR file
     * @throws ThemeException if the JAR file does not exist
     */
    protected Path getJarFile(final Artifact artifact) {
        final Path jarPath = ResourceUtil.getPluginPath(artifact.getFileName());
        if (!Files.exists(jarPath)) {
            throw new ThemeException(artifact.getFileName() + " does not exist.");
        }
        return jarPath;
    }