/// <inheritdoc />
 public async Task <IReadOnlyCollection <IElementHandle> > QuerySelectorAllAsync(string selector)
 => (await _channel.QuerySelectorAllAsync(selector).ConfigureAwait(false)).Select(e => ((ElementHandleChannel)e).Object).ToList().AsReadOnly();
 /// <inheritdoc />
 public async Task <IEnumerable <IElementHandle> > QuerySelectorAllAsync(string selector)
 => (await _channel.QuerySelectorAllAsync(selector).ConfigureAwait(false)).Select(e => ((ElementHandleChannel)e).Object);