add contract class in to other contract class in x++ in d365F&O
List items = new List(Types::Class); [DataMemberAttribute("Items"), DataCollection(Types::Class, classStr(<Name of contract class>)), AifCollectionTypeAttribute('_items', Types::Class, classStr(<Name of contract class>)), AifCollectionTypeAttribute('return', Types::Class, classStr(<Name of contract class>))] public List parmitems (List _items = items ) { items = _items ; return items ; }