code: Object executeScript(String jsScript) {
      String jsScriptWithFunction = "(function (){" + jsScript + "})();";
      try {
        return jsScriptEngine.eval(jsScriptWithFunction);
      } catch (ScriptException e) {
        throw new org.molgenis.script.core.ScriptException(e);
      }
    }
docs: Executes the given JavaScript, e.g. 'var product = 2 * 3; return product;'
  
  @param jsScript JavaScript
  @return value of which the type depends on the JavaScript type of the returned variable