code: def update_ssl_termination(self, loadbalancer, securePort=None, enabled=None,
              secureTrafficOnly=None):
          
          ssl_info = self.get_ssl_termination(loadbalancer)
          if not ssl_info:
              raise exc.NoSSLTerminationConfiguration("You must configure SSL "
                      "termination on this load balancer before attempting "
                      "to update it.")
          if securePort is None:
              securePort = ssl_info["securePort"]
          if enabled is None:
              enabled = ssl_info["enabled"]
          if secureTrafficOnly is None:
              secureTrafficOnly = ssl_info["secureTrafficOnly"]
          uri = "/loadbalancers/%s/ssltermination" % utils.get_id(loadbalancer)
          req_body = {"sslTermination": {
                  "enabled": enabled,
                  "secureTrafficOnly": secureTrafficOnly,
                  "securePort": securePort,
                  }}
          resp, body = self.api.method_put(uri, body=req_body)
          return body
docs: Updates existing SSL termination information for the load balancer
          without affecting the existing certificates/keys.