code: private boolean isHighestAlert(Alert alert) {
          if (alert.getConfidence() == Alert.CONFIDENCE_FALSE_POSITIVE) {
              return false;
          }
          if (highestAlert == null) {
              return true;
          }
          return alert.getRisk() > highestAlert.getRisk();
      }
docs: Tells whether or not the given alert is the alert with highest risk than the current highest alert.
  <p>
  {@link Alert#CONFIDENCE_FALSE_POSITIVE False positive alerts} are ignored.
  
  @param alert the alert to check
  @return {@code true} if it's the alert with highest risk, {@code false} otherwise.