docs: private void sendHeartbeat(Member target) {
          if (target == null) {
              return;
          }
          try {
              MembersViewMetadata membersViewMetadata = clusterService.getMembershipManager().createLocalMembersViewMetadata();
              Operation op = new HeartbeatOp(membersViewMetadata, target.getUuid(), clusterClock.getClusterTime());
              op.setCallerUuid(clusterService.getThisUuid());
              node.nodeEngine.getOperationService().send(op, target.getAddress());
          } catch (Exception e) {
              if (logger.isFineEnabled()) {
                  logger.fine(format("Error while sending heartbeat -> %s[%s]", e.getClass().getName(), e.getMessage()));
              }
          }
      }