title: Get height of outline box in TextInputLayout
body: <p><strong>What I want :</strong> </p>
  
  <p>I am building a component that looks like the following, where the height of the <code>+</code> &amp; <code>-</code> buttons need to match the height of the outline of the TextInputLayout.</p>
  
  <p><a href="https://i.stack.imgur.com/As5Yn.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/As5Yn.png" alt="enter image description here"></a></p>
  
  <p><strong>What I tried :</strong></p>
  
  <p>There seems to be no public api that lets me get the height of the outline.
  However, within the <code>TextInputLayout</code> there is <code>private MaterialShapeDrawable boxBackground;</code> but it is private.</p>
  
  <p>How can I make my buttons match the height of the outline ?</p>