def set_wh!(layout, width, height)
      layout.width  = width * Pango::SCALE unless width.nil? || width == :auto
      layout.height = height * Pango::SCALE unless height.nil? || height == :auto
    end
def set_wh!(layout, width, height)
      layout.width  = width * Pango::SCALE unless width.nil? || width == :auto
      layout.height = height * Pango::SCALE unless height.nil? || height == :auto
    end
:nodoc:
 @api private