title: Function Fields Feature in Matlab
body: <p><code>mapminmax</code> is a builtin Matlab function. I am trying to implement something that does autocomplete for functions/subfunctions like this.</p>
  
  <p><img src="https://i.stack.imgur.com/A6v2P.png" alt="enter image description here"></p>
  
  <p>I've done a quick search but haven't really come up with what it's called. <code>mapminmax</code> is the only function I know of that implements this feature. It looks like a field of a function (like how a field of a struct).</p>
  
  <p>I've used <code>edit mapminmax</code> to see the insides of Matlab's function but I haven't found anything leading to how this is possible. <code>getParamStructFromArgs</code> looks like it might be able to explain what this is, but it looks like it's related to NNs.</p>
  
  <p><strong>Question:</strong> What is this feature called and is there any documentation on this?</p>