docs: def find_button(browser, value):
      """
      Find a button with the given value.
  
      Searches for the following different kinds of buttons:
  
          <input type="submit">
          <input type="reset">
          <input type="button">
          <input type="image">
          <button>
          <{a,p,div,span,...} role="button">
  
      Returns: an :class:`ElementSelector`
      """
      field_types = (
          'submit',
          'reset',
          'button-element',
          'button',
          'image',
          'button-role',
      )
  
      return reduce(
          operator.add,
          (find_field_with_value(browser, field_type, value)
           for field_type in field_types)
      )