what does createContainer in Meteor using React do?
<p>I'm working on the Meteor using React tutorial and trying to understand createContainer().  From reading here:</p>

<p><a href="http://guide.meteor.com/v1.3/react.html#using-createContainer">http://guide.meteor.com/v1.3/react.html#using-createContainer</a> </p>

<p>I think that its a function defined in <code>meteor/react-meteor-data</code> that is used for data loading. In this specific case, it retrieving data from the Mini Mongo Database (named <code>Task</code> here).  My question is, what does the second argument to createContainer do?  (named <code>App</code> here).  Thank you!</p>

<pre><code>class App extends Component {
   //...class definition
}

 export default createContainer(() =&gt; {
  return {
    //Tasks is a Mongo.Collection
    //returns the matching rows (documents)
    //here we define the value for tasks member
    tasks: Tasks.find({}, { sort: { createdAt: -1} }).fetch(),
  };
}, App);
</code></pre>