docs: private void updateClientPolicy(Message m) {
          if (!clientSidePolicyCalced) {
              PolicyDataEngine policyEngine = bus.getExtension(PolicyDataEngine.class);
              if (policyEngine != null && endpointInfo.getService() != null) {
                  clientSidePolicy = policyEngine.getClientEndpointPolicy(m,
                                                                          endpointInfo,
                                                                          this,
                                                                          new ClientPolicyCalculator());
                  if (clientSidePolicy != null) {
                      clientSidePolicy.removePropertyChangeListener(this); //make sure we aren't added twice
                      clientSidePolicy.addPropertyChangeListener(this);
                  }
              }
          }
          clientSidePolicyCalced = true;
      }