title: How to change back button in material design?
body: <p>In past to replace back icon at the action bar by a new one we use this aatribute in styles:</p>
  
  <pre><code>&lt;item name="android:homeAsUpIndicator"&gt;@drawable/up_indicator&lt;/item&gt;
  </code></pre>
  
  <p>But similar approach with toolbar doesn't work:</p>
  
  <pre><code> &lt;style name="Toolbar" parent="@style/Widget.AppCompat.Toolbar"&gt;
          &lt;item name="android:windowNoTitle"&gt;true&lt;/item&gt;
          &lt;item name="title"&gt;@null&lt;/item&gt;
          &lt;item name="homeAsUpIndicator"&gt;@null&lt;/item&gt;
   &lt;/style&gt;
  </code></pre>
  
  <p>Do you have solution for this or can you share a link to source code with this styles? I don't find it by myslef. Al help will be appreciated</p>