Expandable / Collapsible UI component
<p>I'm looking for the following Expandable/ Collapsible UI component.</p>

<h2>Before expanding</h2>

<p><img src="http://i.stack.imgur.com/Dn2TG.png" alt="enter image description here"></p>

<h2>After expanding</h2>

<p><img src="http://i.stack.imgur.com/hkKNU.png" alt="enter image description here"></p>

<p>Anyone had came across such expandable UI component library?</p>
