Represents a container that utilizes a flexible layout.
<px-flex-panel orientation="horizontal">
<div class="text center blue">Left</div>
<div class="text center red" style="flex: 1;">Center</div>
<div class="text center green">Right</div>
</px-flex-panel><px-flex-panel style="height: 160px;">
<div class="text blue">Left</div>
<div class="text red" style="flex: 1;">Center</div>
<div class="text green">Right</div>
</px-flex-panel>