String outboundURL = ((HttpOutboundServletRewrite) event).getOutboundAddress().toString();
QueryStringBuilder query = QueryStringBuilder.createNew();
if (outboundURL.contains("?"))
{
query.addParameters(outboundURL);
for (String string : parameters) {
List<String> values = query.removeParameter(string);
if (values.size() > 1)
{
query.addParameter(string, values.subList(1, values.size()).toArray(new String[] {}));