code: private boolean isOverThreshold(final ThresholdLogSpan span) {
          String service = (String) span.tag(Tags.PEER_SERVICE.getKey());
          if (SERVICE_KV.equals(service)) {
              return span.durationMicros() >= kvThreshold;
          } else if (SERVICE_N1QL.equals(service)) {
              return span.durationMicros() >= n1qlThreshold;
          } else if (SERVICE_VIEW.equals(service)) {
              return span.durationMicros() >= viewThreshold;
          } else if (SERVICE_FTS.equals(service)) {
              return span.durationMicros() >= ftsThreshold;
          } else if (SERVICE_ANALYTICS.equals(service)) {
              return span.durationMicros() >= analyticsThreshold;
          } else {
              return false;
          }
      }
docs: Checks if the given span is over the threshold and eligible for being
  reported.
  
  @param span the span to check.
  @return true if it is, false otherwise.