title: Guzzle client request method returns response object instead of request object
body: <p>I am new to Guzzle and tried to read documentation, but still can't find the answer for it.</p>
  
  <p>For example - I get this code from <a href="http://guzzle3.readthedocs.org/http-client/request.html#post-requests" rel="nofollow">here</a></p>
  
  <pre><code>$request = $client-&gt;post('http://httpbin.org/post', array(), array(
      'custom_field' =&gt; 'my custom value',
      'file_field'   =&gt; '@/path/to/file.xml'
  ));
  
  $response = $request-&gt;send();
  </code></pre>
  
  <p>I tried to do the same thing, but when $client->post() is executed, it returns a response object, instead of request.
  What can be wrong?</p>
  
  <p>I am using the version 6.</p>