/// <summary>
/// Invoke the action on the domain object with the parameters in the form. Return result and update valid bool to indicate if
/// parameters valid.
/// </summary>
protected T InvokeAction <T>(object domainObject, string actionName, FormCollection parameters, out bool valid)
{
INakedObject nakedObject = NakedObjectsContext.GetNakedObject(domainObject);
IActionSpec action = nakedObject.GetActionLeafNode(actionName);
return(InvokeAction <T>(nakedObject, action, parameters, out valid));
}