void gtk_icon_theme_set_resource_path ( GtkIconTheme* self, const char* const* path )
Sets the resource paths that will be looked at when looking for icons, similar to search paths.
The resources are considered as part of the hicolor icon theme
and must be located in subdirectories that are defined in the
hicolor icon theme, such as
Icons that are directly placed in the resource path instead of a subdirectory are also considered as ultimate fallback, but they are treated like unthemed icons.