Intended as a future extensibility point, provides a way for the parser to redirect into a static method library of helpers
Currently, only one method is available - ContainsAny
Functions like string.Contains but uses needles from a List<string>
var values = new Dictionary<string,object>();
var keywords = new List<string>();
keywords.Add("Five");
keywords.Add("Four");
values.Add("keywords",keywords);
var items = @Model.Children.Where("Name.ContainsAny(keywords)", values);
