Function gtk_sys::gtk_icon_set_render_icon

pub unsafe extern "C" fn gtk_icon_set_render_icon(
    icon_set: *mut GtkIconSet,
    style: *mut GtkStyle,
    direction: GtkTextDirection,
    state: GtkStateType,
    size: GtkIconSize,
    widget: *mut GtkWidget,
    detail: *const c_char
) -> *mut GdkPixbuf