code: def set_font_options(self, font_options):
          
          cairo.cairo_set_font_options(self._pointer, font_options._pointer)
          self._check_status()
docs: Sets a set of custom font rendering options.
          Rendering options are derived by merging these options
          with the options derived from underlying surface;
          if the value in options has a default value
          (like :obj:`ANTIALIAS_DEFAULT`),
          then the value from the surface is used.
  
          :param font_options: A :class:`FontOptions` object.