title: Change window Exposé behavior outside of Interface Builder
body: <p>Here's the setting I'm talking about: </p>
  
  <p><img src="https://i.stack.imgur.com/QK4Id.png" alt="enter image description here"></p>
  
  <p>I'm wondering if I can change the Exposé behavior on the fly, or even during initialization in my code? I have some users that don't wish to see my app firmly planted on the desktop (Stationary Behavior), so I wanted to add an option to allow it to roam freely during Exposé.  However, I haven't found a property to change this on my window.  Is it possible? </p>