code: public static Config load(final String... resources) {
          final ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
          try (final InputStream resourceAsStream = findResource("jjs-config-utils.js")) {
              engine.eval(new InputStreamReader(resourceAsStream));
              loadResources(engine, resources);
          } catch (final ScriptException se) {
              throw new IllegalArgumentException("unable to execute main javascript.", se);
          } catch (final Exception ex) {
              if (ex instanceof IllegalArgumentException) {
                  throw (IllegalArgumentException) ex;
              }
              throw new IllegalArgumentException("unable to load main resource ", ex);
          }
          return loadFromObject(engine.get("config"));
      }
docs: Loads a config file.
  
  @param resources classpath resources to from which to load javascript
  @return Config.