title: About the "body" parameter for tinymce's "windowManager.open" method
body: <p>I'm looking at this example w.r.t creating tinyMCE plugin. What I want to do is to open
  a popup, and the content inside the popup is specified programmatically, without having to load a physical page at certain url:</p>
  
  <p><a href="https://stackoverflow.com/questions/20295592/add-an-input-element-of-type-file-in-tinymce-container">Add an input element of type=file in tinymce container</a></p>
  
  <p>Basically the author solved the issue about a plugin he was trying to create. I'm trying the same code but the popup is completely empty for me, no errors, any suggestions? Where can I find info about the "body" parameter when calling "windowManager.open", like:</p>
  
  <pre><code>// Open window
  editor.windowManager.open({
      title: 'Example plugin',
      body: [{
          type: 'textbox',
          name: 'code',
          label: 'Video code'
      }],
  ...
  </code></pre>