db.documents.probe() throws error when transaction Id is passed as second param

[csreddy]

the documentation shows that probe() takes 2 params uri and txid but its throws below error
ex:

 db.documents.probe('/test/transaction/doc1.json', tid).result();

works only if passed as an object

 db.documents.probe({uri:'/test/transaction/doc1.json', txid: tid}).result();

 Uncaught Error: must supply uri for document check()
      at Documents.probeDocumentsImpl (/Users/sreddy/space/angularjs/node-client-api/lib/documents.js:171:11)
      at Documents.probeDocument [as probe] (/Users/sreddy/space/angularjs/node-client-api/lib/documents.js:166:29)
      at /Users/sreddy/space/angularjs/node-client-api/test-complete/nodejs-probe-txn.js:34:27
      at tryCatcher (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/util.js:24:31)
      at Promise._settlePromiseFromHandler (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/promise.js:454:31)
      at Promise._settlePromiseAt (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/promise.js:530:18)
      at Promise._settlePromises (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/promise.js:646:14)
      at Async._drainQueue (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/async.js:177:16)
      at Async._drainQueues (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/async.js:187:10)
      at Immediate.Async.drainQueues [as _onImmediate] (/Users/sreddy/space/angularjs/node-client-api/node_modules/bluebird/js/main/async.js:15:14)
      at tryOnImmediate (timers.js:534:15)
      at processImmediate [as _immediateCallback] (timers.js:514:5)