title: Access nested Immutable Map property
body: <p>I'm learning Immutable.js. I have an object that when called:</p>
  
  <p><code>myObj.get('people')</code></p>
  
  <p>returns the following:</p>
  
  <pre><code>[
    {
      "name": "John Stevenson",
      "country": "Sweden"
    },
    {
      "name": "John Silva",
      "country": "Colombia"
    },
    {
      "name": "John Van der Bier",
      "country": "Holland"
    },
    {
      "name": "John McDonald",
      "country": "Scotland"
    }
  ]
  </code></pre>
  
  <p>I'm trying to get inside this object so I can only see <code>country</code>:</p>
  
  <p><code>myObj.getIn(['people', 'country']) // undefined</code></p>
  
  <p>What am I missing?</p>