id="textbox"
                   required$="[[required]]"
                   value="{{query::input}}">
        <paper-icon-button suffix on-tap="onClearInput_"
          id="clear" icon="clear" alt="clear" title="clear">
        </paper-icon-button>
      </paper-input>
      <paper-material
          id="dropdown-container"
          hidden$="[[!showDropdown]]">
        <paper-menu id="dropdown"
                    tabindex="-1"
                    on-mousedown="onDropdownMouseDown"
                    on-i