code: public MetricBuilder withMessage(String messagePattern, Object ...params) {
          this.metricMessage = MessageFormat.format(messagePattern, params);
          return this;
      }
docs: Sets the message to be associated with this metric.
  
  @param messagePattern the message pattern to be associated with this metric
  @param params the parameter to pass to {@link MessageFormat} to
  create the complete message
  @return this