Performs a batch Track/Trace lookup on the specified label numbers. Note: A maximum of 100 at a time can be looked up or an error will occur. When looking up more than 10 labels you must use a POST request.
LabelNoList - A semicolon-delimited list of label numbers to look up trace/trace details of, eg 'FA000000000;FA000000001;FA0000000002' etc
CountryCode - The code of the country in which every label in the list resides. Optional: If omitted, will be automatically determined. See here for a list of valid country codes.
A data structure containing an array of objects identical to those returned by the detail method.