pub unsafe extern "C" fn webkit_web_view_run_async_javascript_function_in_world(
    web_view: *mut WebKitWebView,
    body: *const c_char,
    arguments: *mut GVariant,
    world_name: *const c_char,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)
Available on crate feature v2_38 only.