Sets the name of the icon theme that the #GtkIconTheme object uses overriding system configuration. This function cannot be called on the icon theme objects returned from gtk_icon_theme_get_default() and gtk_icon_theme_get_for_screen().
name of icon theme to use instead of configured theme, or %NULL to unset a previously set custom theme
2.4
See Implementation
Sets the name of the icon theme that the #GtkIconTheme object uses overriding system configuration. This function cannot be called on the icon theme objects returned from gtk_icon_theme_get_default() and gtk_icon_theme_get_for_screen().