GtkCssValue * _gtk_style_context_peek_property (GtkStyleContext *context,
guint property_id);
-double _gtk_style_context_get_number (GtkStyleContext *context,
- guint property_id,
- double one_hundred_percent);
const GValue * _gtk_style_context_peek_style_property (GtkStyleContext *context,
GType widget_type,
GtkStateFlags state,