docs: def find_field_by_name(browser, field_type, name):
      """
      Locate the control input with the given ``name``.
  
      :param browser: ``world.browser``
      :param string field_type: a field type (i.e. `button`)
      :param string name: ``name`` attribute
  
      Returns: an :class:`ElementSelector`
      """
      return ElementSelector(
          browser,
          field_xpath(field_type, 'name') %
          string_literal(name),
          filter_displayed=True,
      )