public void override_font (FontDescription? font_desc)
Warning: override_font is deprecated since "3.16".
Sets the font to use for a widget.
This function is not useful in the context of CSS-based rendering. If you wish to change the font a widget uses to render its text you should use a custom CSS style, through an application-specific StyleProvider and a CSS style class.
All other style values are left untouched. See override_color.
the font description to use, or null to undo the effect of previous calls to override_font