title: MvvmCross Bind command to <include> toolbar
body: <p>I want to bind commands to my toolbars' items. Is it possible?
  I have tried this but it's still doesn't work <a href="https://stackoverflow.com/a/21936542/6160208">https://stackoverflow.com/a/21936542/6160208</a></p>
  
  <p><strong>Toolbar.axml</strong></p>
  
  <pre><code>&lt;Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:local="http://schemas.android.com/apk/res-auto"
              android:background="@android:color/holo_blue_light"
              android:layout_width="match_parent"
              android:layout_height="85dp"&gt;
  
          &lt;ImageButton
              android:src="@drawable/search"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:id="@+id/searchImageButton"
              android:layout_marginLeft="290dp"
              local:MvxBind="Click DoSearchCommand"
              android:background="@android:color/holo_blue_light" /&gt;
  </code></pre>
  
  <p><strong>MainView.axml</strong></p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:local="http://schemas.android.com/apk/res-auto"
            android:orientation="vertical"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"&gt;
            &lt;include
                layout="@layout/toolbar" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p><strong>MainViewModel.cs</strong></p>
  
  <pre><code>    private MvxCommand _searchCommand;
      public System.Windows.Input.ICommand SearchCommand
      {
          get
          {
              _searchCommand = _searchCommand ?? new MvxCommand(DoSearchCommand);
              return _searchCommand;
          }
      }
      private void DoSearchCommand()
      {
          ShowViewModel&lt;SearchViewModel&gt;();
      }
  </code></pre>