Returns TRUE if this workflow is currently suppressing all workflow notifications for this particular workflow event. Suppression includes notification into both the workflow in queue and email until either the current action is ended or the
wfSetIsNotifyingUsers function is used to re-enable notification.
Suppression of notifications is temporary. If notification is enabled or allowed to remain on for a later workflow action, all notifications that were not sent out for the current step are then sent out and workflows in queues are appropriated updated.
Returns TRUE if notifications are suppressed.
Returns FALSE if notifications are being suppressed.