code: func (v *FontDescription) SetWeight(weight Weight) {
  	C.pango_font_description_set_weight(v.native(), (C.PangoWeight)(weight))
  }
docs: //void                 pango_font_description_set_variant       (PangoFontDescription *desc,
  //							       PangoVariant          variant);
  //PangoVariant         pango_font_description_get_variant       (const PangoFontDescription *desc) G_GNUC_PURE;
  //void                 pango_font_description_set_weight        (PangoFontDescription *desc,
  //							       PangoWeight           weight);