Function webkit2gtk_sys::webkit_cookie_manager_add_cookie

pub unsafe extern "C" fn webkit_cookie_manager_add_cookie(
    cookie_manager: *mut WebKitCookieManager,
    cookie: *mut SoupCookie,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)

Available on crate feature v2_20 only.