title: Assign types to a specific index using NEST2
body: <p>I would like to be able to set up some sort of mapping using the NEST2 client so that different types are automatically put in a defined index. Is this possible?</p>
  
  <p>I've tried to map types like this:</p>
  
  <pre><code>client.Map&lt;A&gt;(m =&gt; m.Index("index1"));
  client.Map&lt;B&gt;(m =&gt; m.Index("index2"));
  </code></pre>
  
  <p>And then index them like this:</p>
  
  <pre><code>client.Index(new SomethingThatGoesToTheDefaultIndex());
  client.Index(new A());//Should end up in index1
  client.Index(new B());//Should end up in index2
  </code></pre>
  
  <p>But everything ends up in the default index and not the set index. Do I need to give the required index every time I store data, or is it possible to set up a defined index per type? </p>