docs: public static void main(String[] urls) throws Exception {
          GroovyScriptEngine gse = new GroovyScriptEngine(urls);
          BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
          String line;
          while (true) {
              System.out.print("groovy> ");
              if ((line = br.readLine()) == null || line.equals("quit")) {
                  break;
              }
              try {
                  System.out.println(gse.run(line, new Binding()));
              } catch (Exception e) {
                  e.printStackTrace();
              }
          }
      }