code: def remove_in_progress_notifications(self, master=True):
          
          for notification in list(self.notifications_in_progress.values()):
              if master and notification.contact:
                  continue
              # Do not remove some specific notifications
              if notification.type in [u'DOWNTIMESTART', u'DOWNTIMEEND', u'DOWNTIMECANCELLED',
                                       u'CUSTOM', u'ACKNOWLEDGEMENT']:
                  continue
              self.remove_in_progress_notification(notification)
docs: Remove all notifications from notifications_in_progress
  
          Preserves some specific notifications (downtime, ...)
  
          :param master: remove master notifications only if True (default value)
          :type master: bool
          :param force: force remove all notifications except if False
          :type force: bool
          :return:None