docs: public static String[] getQueryParameterValues(RESTRequest request, String name) {
          if (!"post".equalsIgnoreCase(request.getMethod())) {
              return request.getParameterValues(name);
          }
  
          if (request.getQueryString() == null) {
              return null;
          }
  
          Hashtable params = null;
          try {
              params = RequestUtils.parseQueryString(request.getQueryString());
          } catch (Exception e) {
              if (TraceComponent.isAnyTracingEnabled() && tc.isEventEnabled()) {
                  Tr.event("DefaultRoutingHelper", tc, "Failed to parse the query string:\n Exception: " + e);
              }
              return null;
          }
  
          return (String[]) params.get(name);
      }