title: Swagger description for request part
body: <p>is it possible to have a request DTO model described in Swagger-UI if it was annotated by <code>@RequestPart</code>, not <code>@RequestBody</code> ?? I have an API which uploads a MultipartFile and additionally I have send a JSON with config at the same time. To make it work I had to use <code>@RequestPart</code> and swagger documentation seems not to handle it at all - in UI instead of full model description I have only &quot;formData&quot; object and that's all.</p>
  <pre><code> public void addPhoto(@RequestParam(FILE_PARAM) MultipartFile file,
                        @RequestPart(&quot;config&quot;) ConfigDTO configDTO) {
           //code goes here
  }
  </code></pre>
  <p>Dependencies I use:</p>
  <pre><code>    &lt;dependency&gt;
          &lt;groupId&gt;io.springfox&lt;/groupId&gt;
          &lt;artifactId&gt;springfox-swagger2&lt;/artifactId&gt;
          &lt;version&gt;2.9.2&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;io.springfox&lt;/groupId&gt;
          &lt;artifactId&gt;springfox-swagger-ui&lt;/artifactId&gt;
          &lt;version&gt;2.9.2&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;io.springfox&lt;/groupId&gt;
          &lt;artifactId&gt;springfox-bean-validators&lt;/artifactId&gt;
          &lt;version&gt;2.9.2&lt;/version&gt;
      &lt;/dependency&gt;
  </code></pre>