title: How to call router outlet child component method from parent comonent
body: <p>I am new to angular2</p>
  
  <pre><code>&lt;parent&gt;
      &lt;router-outlet&gt;&lt;router-outlet&gt;
  &lt;/parent&gt;
  </code></pre>
  
  <p>I have a button in parent component, if I click that button it should call a method in the child component (which is loaded in router outlet.)</p>
  
  <p>Is there any way to call the child component (in router outlet) method from parent ?</p>