docs: public Object executePhantomJS(String script, Object... args) {
          script = script.replaceAll("\"", "\\\"");
  
          Iterable<Object> convertedArgs = Iterables.transform(
                  Lists.newArrayList(args), new WebElementToJsonConverter());
          Map<String, ?> params = ImmutableMap.of(
                  "script", script, "args", Lists.newArrayList(convertedArgs));
  
          return execute(COMMAND_EXECUTE_PHANTOM_SCRIPT, params).getValue();
      }