/// <summary>
/// This will return the normal service url based on id but will also ensure that the data type definition id is passed through as the nodeKey param
/// </summary>
/// <param name="tree">The tree.</param>
/// <param name="id">The id.</param>
/// <param name="dataTypeDefId">The data type def id.</param>
/// <returns></returns>
/// <remarks>
/// We only need to set the custom source to pass in our extra NodeKey data.
/// By default the system will use one or the other: Id or NodeKey, in this case
/// we are sort of 'tricking' the system and we require both.
/// Umbraco allows you to theoretically pass in any source as long as it meets the standard
/// which means you can pass around any arbitrary data to your trees in the form of a query string,
/// though it's just a bit convoluted to do so.
/// </remarks>
internal static string GetTreeServiceUrlWithParams(this BaseTree tree, int id, int dataTypeDefId)
{
var url = tree.GetTreeServiceUrl(id);
//append the node key
return(url + "&nodeKey=" + dataTypeDefId);
}