code: private void addPostParams(final Request request) {
          if (identity != null) {
              request.addPostParam("Identity", identity);
          }
  
          if (bindingType != null) {
              request.addPostParam("BindingType", bindingType.toString());
          }
  
          if (address != null) {
              request.addPostParam("Address", address);
          }
  
          if (tag != null) {
              for (String prop : tag) {
                  request.addPostParam("Tag", prop);
              }
          }
  
          if (notificationProtocolVersion != null) {
              request.addPostParam("NotificationProtocolVersion", notificationProtocolVersion);
          }
  
          if (credentialSid != null) {
              request.addPostParam("CredentialSid", credentialSid);
          }
  
          if (endpoint != null) {
              request.addPostParam("Endpoint", endpoint);
          }
      }
docs: Add the requested post parameters to the Request.
  
  @param request Request to add post params to