View designer.html
<link rel="import" href="../core-animated-pages/core-animated-pages.html">
<link rel="import" href="../core-animated-pages/transitions/hero-transition.html">
<link rel="import" href="../core-animated-pages/transitions/cross-fade.html">
<link rel="import" href="../core-animated-pages/transitions/slide-down.html">
<link rel="import" href="../core-animated-pages/transitions/slide-up.html">
<link rel="import" href="../core-animated-pages/transitions/tile-cascade.html">
<polymer-element name="my-element">
<template>