void _ensureKeepAlive() { D.assert(this._keepAliveHandle == null); this._keepAliveHandle = new KeepAliveHandle(); new KeepAliveNotification(this._keepAliveHandle).dispatch(this.context); }
void _releaseKeepAlive() { this._keepAliveHandle.release(); this._keepAliveHandle = null; }
void _releaseKeepAlive() { _keepAliveHandle.release(); _keepAliveHandle = null; }