docs: public ClientExecutionAbortTrackerTask startTimer(int clientExecutionTimeoutMillis) {
          if (isTimeoutDisabled(clientExecutionTimeoutMillis)) {
              return NoOpClientExecutionAbortTrackerTask.INSTANCE;
          } else if (executor == null) {
              initializeExecutor();
          }
          return scheduleTimerTask(clientExecutionTimeoutMillis);
      }