docs: public Runnable execute(Runnable command, long timeoutInMillis) throws InterruptedException, IllegalStateException {
          try {
              return execute(command, WAIT_WHEN_QUEUE_IS_FULL, timeoutInMillis);
          } catch (ThreadPoolQueueIsFullException e) {
              // we should not get here.
              // Alex Ffdc.log(e, this, ThreadPool.class.getName(), "855"); // D477704.2
              return null;
          }
      }