code: public void setIpRoutes(java.util.Collection<IpRoute> ipRoutes) {
          if (ipRoutes == null) {
              this.ipRoutes = null;
              return;
          }
  
          this.ipRoutes = new com.amazonaws.internal.SdkInternalList<IpRoute>(ipRoutes);
      }
docs: <p>
  IP address blocks, using CIDR format, of the traffic to route. This is often the IP address block of the DNS
  server used for your on-premises domain.
  </p>
  
  @param ipRoutes
  IP address blocks, using CIDR format, of the traffic to route. This is often the IP address block of the
  DNS server used for your on-premises domain.