title: MDCSnackbarManager buttonFont not working
body: <p>I am currently using <a href="https://material.io/design/components/snackbars.html" rel="nofollow noreferrer">Material IO Components</a> to create a snackbar needed for the app I'm working on, and it's got everything I need except for one little thing: I need to be able to change the font of the action button, but using the attributes provided in the documentation doesn't work.</p>
  
  <p>In the <a href="https://material.io/develop/ios/components/snackbars/api-docs/Classes/MDCSnackbarManager.html" rel="nofollow noreferrer">MDCSnackbarManager</a> there is a <code>buttonFont</code> attribute, but that doesn't work (the <code>messageFont</code> works just fine though)</p>
  
  <p>There is also a <code>buttonFont</code> attribute inside the <a href="https://material.io/develop/ios/components/snackbars/api-docs/Classes/MDCSnackbarMessageView.html" rel="nofollow noreferrer">MDCSnackbarMessageView</a> but that doesn't work either.</p>
  
  <p>The code that I've tried so far are these (with the messageFont being the only working one among the three)</p>
  
  <pre><code>MDCSnackbarManager.messageFont = UIFont(name: "Lato-Bold", size: 18)
  MDCSnackbarManager.buttonFont = UIFont(name: "Lato-Bold", size: 13)
  MDCSnackbarMessageView.appearance().buttonFont = UIFont(name: "Lato-Bold", size: 13)
  </code></pre>
  
  <p>Any suggestions or solutions on how to fix this is greatly appreciated!</p>