// never returned
            return "";
        });
    }

    public List<String> getExecutedTasks() {
        return ImmutableList.copyOf(findExecutedTasksInOrderStarted());
    }

    private Set<String> findExecutedTasksInOrderStarted() {
        if (tasks == null) {
            tasks = new LinkedHashSet<>(grepTasks(TASK_PATTERN));
        }
        return tasks;
    }

    @Override