title: Nested views in tabs binding to separate ViewModel
body: <p>Is there a way how to provide a nested view it's own viewmodel?</p>
  
  <p>Example:
  Master view of type TabbedView has multiple tabs.</p>
  
  <pre><code>&lt;mvx:MvxTabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
                       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                       x:Class="Foo.Core.Pages.Access.MainPage"
                       xmlns:res="clr-namespace:Foo.Core.Resources;assembly=Foo.Core"
                       xmlns:mvx="clr-namespace:MvvmCross.Forms.Views;assembly=MvvmCross.Forms"
                       xmlns:views="clr-namespace:Foo.Core.Pages.Access"&gt;
  
      &lt;TabbedPage.Children&gt;
          &lt;views:LoginPage&gt;&lt;/views:LoginPage&gt;
          &lt;views:RegisterPage&gt;&lt;/views:RegisterPage&gt;
      &lt;/TabbedPage.Children&gt;
  &lt;/mvx:MvxTabbedPage&gt;
  </code></pre>
  
  <p>The <code>LoginPage</code> and <code>RegisterPage</code> are in separate views. But all the binding must be in the MainViewModel and I want the bindings to be separately in the <code>LoginViewModel</code> and <code>RegisterViewModel</code>.</p>
  
  <p>Is there a way how to setup the binding to the properties to appropriate viewmodel? Preferably in XAML.</p>