title: Replacing Map with Iterable in ImmutableJS
body: <p>I'm having this snippet of code that I want to transform to A sequence or Iterable in ImmutableJS. Could Anyone show me how this would turn out to be? </p>
  
  <pre><code>import { INCREMENT } from '../actionTypes/default'
  import { Map } from 'immutable'
  
  const INCREASE_NUMBER = (state = Map({ number: 0}), action) =&gt; {
    switch(action.type) {
      case INCREMENT:
      return state.update('number', num =&gt; num + 1 )
      default:
      return state
    }
  };
  
  module.exports = INCREASE_NUMBER
  </code></pre>