docs: public boolean add(final Task task) throws EntryExistsException
    {
      if (taskStorage.getTask(task.getId()).isPresent()) {
        throw new EntryExistsException(StringUtils.format("Task %s is already exists", task.getId()));
      }
  
      giant.lock();
  
      try {
        Preconditions.checkState(active, "Queue is not active!");
        Preconditions.checkNotNull(task, "task");
        Preconditions.checkState(tasks.size() < config.getMaxSize(), "Too many tasks (max = %,d)", config.getMaxSize());
  
        // If this throws with any sort of exception, including TaskExistsException, we don't want to
        // insert the task into our queue. So don't catch it.
        taskStorage.insert(task, TaskStatus.running(task.getId()));
        addTaskInternal(task);
        managementMayBeNecessary.signalAll();
        return true;
      }
      finally {
        giant.unlock();
      }
    }