title: Polymer-redux object observing
body: <p>So I am using redux with polymer 2.0 and its working very well. Then I suddenly came across a problem and I cannot for the life of me find out what I should be doing.</p>
  
  <pre><code>  settings:{
                type:Object,
                statePath: 'setting.documentSettings',
                observer:'_extendedInfo'
            }
  </code></pre>
  
  <hr>
  
  <pre><code>  const settingsReducer = (state={"documentSettings":{},"searchSettings":{},"discussionSettings":{},"entrySettings":{}}, action) =&gt; {
  </code></pre>
  
  <p>And then in my action.</p>
  
  <pre><code>  return Object.assign({}, state, {
                                  documentSettings: setting
                               });  
  </code></pre>
  
  <p>Also I have multiple reducers that are combined thats why its setting.documentSettings in my property</p>
  
  <p>So I change the object documentSettings, and the property settings does change, which is great. The observer is never hit though and I cannot find an example anywhere of this.</p>