title: File stream pause error in Watson Dialog service with Node.js
body: <p>I am trying to use the IBM Watson Dialog service with Node.js.</p>
  
  <p>I'm following the API reference for Node.js here <a href="https://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/dialog/api/v1/?node#" rel="nofollow">https://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/dialog/api/v1/?node#</a></p>
  
  <p>According to that, the way to create a dialog is this:</p>
  
  <pre><code>var fs     = require('fs');
  var watson = require('watson-developer-cloud');
  var dialog_service = watson.dialog({
    username: '{username}',
    password: '{password}',
    version: 'v1'
  });
  
  var params = {
    name: 'my-dialog',
    file: fs.createFileStream('template.xml')
  };
  
  dialog_service.createDialog(params, function(err, dialog) {
    if (err)
      console.log(err)
    else
      console.log(dialog);
  });
  </code></pre>
  
  <p>But the function fs.createFileStream doesn't exist so I used fs.createWriteStream with the same code.</p>
  
  <p>But when I try to run that I get the following error</p>
  
  <pre><code>/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/node_modules/combined-stream/node_modules/delayed-stream/lib/delayed_stream.js:35
      source.pause();
  
  TypeError: source.pause is not a function
      at Function.DelayedStream.create (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/node_modules/combined-stream/node_modules/delayed-stream/lib/delayed_stream.js:35:12)
      at FormData.CombinedStream.append (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/node_modules/combined-stream/lib/combined_stream.js:43:37)
      at FormData.append (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/node_modules/form-data/lib/form_data.js:46:3)
      at appendFormValue (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/request.js:339:21)
      at Request.init (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/request.js:350:11)
      at new Request (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/request.js:140:8)
      at request (/home/ubuntu/workspace/node_modules/watson-developer-cloud/node_modules/request/index.js:55:10)
      at createRequest (/home/ubuntu/workspace/node_modules/watson-developer-cloud/lib/requestwrapper.js:131:10)
      at Dialog.createDialog (/home/ubuntu/workspace/node_modules/watson-developer-cloud/services/dialog/v1.js:192:10)
      at Object.&lt;anonymous&gt; (/home/ubuntu/workspace/dialog.js:15:16)
  </code></pre>
  
  <p>Any ideas why this pause function is not working? The error is shown on one of the modules from the watson-developer-cloud package so it is not part of my code.</p>