code: @Override
      public String evalStrictToString(String script) {
          Object returnedObject = context.evaluateString(scope, script, "<cmd>", 1, null);
          String unwrappedObject = unwrapProcessedObjectToString(returnedObject);
  
          if (unwrappedObject != null) {
              return unwrappedObject;
          } else return "null";
      }
docs: Used for processing js expressions in page spec reader. In case of failure throws an exception
  @param script - JavaScript code
  @return result of JavaScript code execution