    # File lib/compass/sass_extensions/functions/sprites.rb, line 60
      def sprite(map, sprite, offset_x = ZERO, offset_y = ZERO)
        sprite = convert_sprite_name(sprite)
        verify_map(map)
        unless sprite.is_a?(Sass::Script::String)
          raise Sass::SyntaxError, %Q(The second argument to sprite() must be a sprite name. See http://beta.compass-style.org/help/tutorials/spriting/ for more information.)
        end
        url = sprite_url(map)
        position = sprite_position(map, sprite, offset_x, offset_y)
        Sass::Script::List.new([url] + position.value, :space)
      end