that we can use like: ``` js tk.is(token, '['); // match token.value tk.is(token, 'Punctuator'); // match token.type tk.is(token, ['(', '{', '[']); // match any value ``` we already use [makeCheck](https://github.com/millermedeiros/rocambole-token/blob/master/makeCheck.js) on all the `find` methods. see #3
