title: Where can I find some documentation on NSTextStorage editedMask?
body: <p>The <a href="https://developer.apple.com/library/mac/documentation/Cocoa/Reference/ApplicationKit/Classes/NSTextStorage_Class/index.html" rel="nofollow">NSTextStorage</a> documentation mentions the <code>editedMask</code> which according to the docs:</p>
  
  <pre><code>Returns the kinds of edits pending for the receiver
  </code></pre>
  
  <p>However, I cannot seem to find any bit flags for this mask anywhere (either in the docs or in the <code>NSTextStorage</code> api. Does anyone know where I can find the details of this mask? (I have also search stackoverflow and while I find questions referencing the use of the mask, I still cannot find the bit definition).</p>