stamped;
      // Check if we are dealing with a "stampable" `<template>`. This is a
      // vaguely defined special case of a `<template>` that is a custom
      // element with a public `stamp` method that implements some manner of
      // data binding.
      if (fixtureTemplate.stamp) {
        stamped = fixtureTemplate.stamp(model);
        // We leak Polymer specifics a little; if there is an element `root`, we
        // want that to be returned.
        stamped = stamped.root || stamped;

      // 