chromium/chrome/browser/resources/ash/settings/device_page/per_device_mouse.html

<template is="dom-repeat" items="[[mice]]"
    as="mouse" index-as="index" restamp>
  <settings-per-device-mouse-subsection mouse="[[mouse]]"
      mouse-policies="[[mousePolicies]]"
      mouse-index="[[index]]"
      is-last-device="[[computeIsLastDevice(index, mice.length)]]">
  </settings-per-device-mouse-subsection>
</template>