if="[[started]]">
          <p class="paragraph">Migration completed.
        </template>
        <iron-form id="migrate_form" headers="[[authHeaders]]" on-iron-form-response="handleResponse">
          <form action="/api/migrate" method="POST">
            <paper-button raised on-tap="submit">Start</paper-button>
          </form>
        </iron-form>
      </template>
    </loading-wrapper>
  </template>

  <script>
    'use strict';
    Polymer({
      is: 'migrate-page',

      properties: {
        sta