title: Kivy: bind method inside the .kv file
body: <p>I would like to delete this line from my .py file:</p>
  
  <pre><code>self.layout.bind(minimum_height=self.layout.setter('height'))
  </code></pre>
  
  <p>and replace it by the same instruction but in the .kv file. Is there any way to bind <code>self.layout.setter('height')</code> to <code>minimum_height</code> ?</p>