$_tasks
$_tasks : array
Tasks.
Global horde shutdown task queue.
add(\Horde_Shutdown_Task  $task) 
                Add a task to the global Horde shutdown queue.
| \Horde_Shutdown_Task | $task | Task to add. | 
addTask(\Horde_Shutdown_Task  $task) 
                Add a task to the shutdown queue.
| \Horde_Shutdown_Task | $task | Task to add. |