set_font_map
Description:
Sets the font map to use for text rendering in the widget.
The font map is the object that is used to look up fonts. Setting a custom font map can be useful in special situations, e.g. when you need to add application-specific fonts to the set of available fonts.
When not set, the widget will inherit the font map from its parent.
Parameters:
| this |
a widget |
| font_map |
a `PangoFontMap` |