title: openUntitledDocumentOfType deprecated, but there is nothing better
body: <p>I have <code>document-based</code> application with function of converting first file type to second. To do this I create new document window with converted content. For me calling <em><code>openUntitledDocumentOfType</code></em> (and then sending there data) is the only work way. Unfortunately it's deprecated. Documentation of <code>ObjC</code> recommends to use <em><code>openUntiledDocumentAndDisplay</code></em> and change <em><code>defaultType</code></em> instead of those, but I need to have first type as default.</p>
  
  <p>Do you know any better way to replace deprecated one?</p>