title: what does getIn() do in Immutable.js?
body: <p>Unfortunately the documentation is very sparse :</p>
  
  <p><a href="https://facebook.github.io/immutable-js/docs/#/Map/getIn" rel="noreferrer">https://facebook.github.io/immutable-js/docs/#/Map/getIn</a></p>
  
  <p>Does anyone have an example? I am <em>guessing</em> that if I have a myObject like so : </p>
  
  <pre><code>  a: {
      b:{
        c:"banana"
      }
    }
  </code></pre>
  
  <p>that</p>
  
  <blockquote>
    <p>myObject.getIn(["a", "b", "c"])</p>
  </blockquote>
  
  <p>will return banana.</p>
  
  <p>However the immutable objects can also be map objects which leaves me thoroughly confused.</p>