call_naptan             Call the NaPTAN API for all, or for specified
                        ATCO codes. Returns a data frame of Naptan
                        data.
call_naptan_region      Call the Naptan API for a partial or full
                        region name. Returns a data frame of Naptan
                        data.
get_atco_codes          Return a vector of all permitted ATCO region
                        codes in NaPTAN
lookup_atco_codes       Return a lookup table of all permitted ATCO
                        codes and area names for a specified area
                        string and/or country
