title: Get reactive var from another template in Meteor
body: <p>I have a template with some nested templates in Meteor:</p>
  
  <pre><code>&lt;template name="collectingTmpl"&gt;
    {{&gt; firstTmpl}}
    {{&gt; secondTmpl}}
  &lt;/template&gt;
  </code></pre>
  
  <p>If I set a reactive var/dict in <code>firstTmpl</code> with</p>
  
  <pre><code>Template.firstTmpl.events({
    'click .class-name': function(event, template) {
      template.state = new ReactiveDict;
      template.state.set('someName', 'someValue');
    }
  });
  </code></pre>
  
  <p>I can get this value within the same template with</p>
  
  <pre><code>Template.firstTmpl.helpers({
    myValue: function() {
      Template.instance().state.get('someName');
    }
  });
  </code></pre>
  
  <p>but can I also retrieve the value being set in <code>firstTmpl</code> from <code>secondTmpl</code>?</p>
  
  <p>I mean something like</p>
  
  <pre><code>Template.secondTmpl.helpers({
    myValueFromAnotherTmpl: function() {
      Template.firstTmpl.state.get('someName');
    }
  });
  </code></pre>