code: protected Embedder newEmbedder() {
          Embedder embedder = null;
          EmbedderClassLoader classLoader = classLoader();
          if (injectableEmbedderClass != null) {
              embedder = classLoader.newInstance(InjectableEmbedder.class, injectableEmbedderClass).injectedEmbedder();
          } else {
              embedder = classLoader.newInstance(Embedder.class, embedderClass);
          }
          
          URL codeLocation = codeLocation();
          if (codeLocation != null) {
              embedder.configuration().storyReporterBuilder().withCodeLocation(codeLocation);
          }
  
          embedder.useClassLoader(classLoader);
          embedder.useEmbedderControls(embedderControls());
          if ( executorsClass != null ){
              ExecutorServiceFactory executorServiceFactory = classLoader.newInstance(ExecutorServiceFactory.class, executorsClass);
              embedder.useExecutorService(executorServiceFactory.create(embedder.embedderControls()));
          }
          embedder.useEmbedderMonitor(embedderMonitor());
          if (isNotEmpty(metaFilters)) {
              List<String> filters = new ArrayList<>();
              for (String filter : metaFilters) {
                  if (filter != null) {
                      filters.add(filter);
                  }
              }
              embedder.useMetaFilters(filters);
          }
          if (!systemProperties.isEmpty()) {
              embedder.useSystemProperties(systemProperties);
          }
          return embedder;
      }
docs: Creates an instance of Embedder, either using
  {@link #injectableEmbedderClass} (if set) or defaulting to
  {@link #embedderClass}.
  
  @return An Embedder