my $interface = WDL::Interfaces::ordering::orderingSoap->new();
my $confirmation = $interface->PlaceOrder({
    request => {
        IsTest => 1,
        Email =>  'tartiflette@cheese.com',
        Password =>  'tartiflette',
        PurchaseOrderRef => 'ref_42',
        Lines =>  [{CatalogueNo => 42, Qty => 5}, 
                   {CatalogueNo => 43, Qty => 6}]
    }
});

# $results isa(WDL::Types::OrderConfirmation)
my $results = $confirmation->get_PlaceOrderResult(); 

# $placedLines isa(WDL::Types::ArrayOfOrderPlacedLine)
my $placedLines = $results->get_PlacedLines();