code: @Override
      public Slf4jMetricReporter init(ConfigurationProperties configurationProperties, MetricRegistry metricRegistry) {
          metricLogReporterMillis = configurationProperties.getMetricLogReporterMillis();
          if (metricLogReporterMillis > 0) {
              this.slf4jReporter = Slf4jReporter
                      .forRegistry(metricRegistry)
                      .outputTo(LOGGER)
                      .build();
          }
          return this;
      }
docs: Create a Log Reporter and activate it if the metricLogReporterMillis property is greater than zero.
  
  @param configurationProperties configuration properties
  @param metricRegistry          metric registry
  @return {@link Slf4jMetricReporter}