/// <summary>
/// Opens a new document loaded from the specified request
/// asynchronously in the given context.
/// </summary>
/// <param name="context">The browsing context to use.</param>
/// <param name="request">The request to issue.</param>
/// <param name="cancel">The cancellation token.</param>
/// <returns>The task that creates the document.</returns>
public static Task <IDocument> OpenAsync(this IBrowsingContext context, DocumentRequest request, CancellationToken cancel = default)
{
request = request ?? throw new ArgumentNullException(nameof(request));
context = context ?? BrowsingContext.New();
return(context.NavigateToAsync(request));
}
