code: @SafeVarargs
      public static <M extends AbstractModule> Injector injector(Class<M>... modules) {
          List<String> names = new ArrayList<String>(modules.length);
          for (Class<?> klass : modules) {
              names.add(klass.getName());
          }
          return ngo.injector(JSArray.create(names.toArray(EMPTY_STRING_ARRAY)));
      }
docs: Returns an injector object that can be used to retrieve services.
  <p>
  See also <a href="https://docs.angularjs.org/api/ng/function/angular.injector">
  https://docs.angularjs.org/api/ng/function/angular.injector</a>
  </p>