/// <summary>
/// Assigns the first argument of the stub (or expected) call through the <paramref name="assign"/> lambda
/// received.
/// <para> An exception is thrown if the method has no argument or the first one is not of the expected type. </para>
/// </summary>
///
/// <typeparam name="TFirstArgument"> Type of the first argument.</typeparam>
/// <param name="options"></param>
/// <param name="assign">The lambda that will be called with the first argument value (C#: x => ... / VB: Sub(x) ...) </param>
public static IMethodOptions <object> AssignFirstArgument <TFirstArgument>(this IMethodOptions <object> options, Action <TFirstArgument> assign)
{
return(options.AssignFirstArgument <Object, TFirstArgument>(assign));
}
