docs: public T jsonPath(String expression, String value) {
          if (jsonPathMessageConstructionInterceptor == null) {
              jsonPathMessageConstructionInterceptor = new JsonPathMessageConstructionInterceptor();
  
              if (getAction().getMessageBuilder() != null) {
                  (getAction().getMessageBuilder()).add(jsonPathMessageConstructionInterceptor);
              } else {
                  PayloadTemplateMessageBuilder messageBuilder = new PayloadTemplateMessageBuilder();
                  messageBuilder.getMessageInterceptors().add(jsonPathMessageConstructionInterceptor);
  
                  getAction().setMessageBuilder(messageBuilder);
              }
          }
  
          jsonPathMessageConstructionInterceptor.getJsonPathExpressions().put(expression, value);
          return self;
      }