A retractable tie down for tying a work vehicle down to a cargo vehicle is disclosed, the tie down including a retractor assembly fixed to the outer surface of a work vehicle; a belt with one end connected to the retractor assembly; and a coupling connected to the other end of the belt, wherein the belt has a length sufficient to reach the cargo vehicle. A clamp plate includes a lower member attachable to the bar. A context value in the alarm message is identified. For each of these intervals, the method determines the number of objects extending into the interval and compares the number of objects with a predetermined threshold value. The jet head has a first plurality of micro-jets facing the fluid impingement side, each of the first plurality of micro-jets having a nozzle, and a second plurality of micro-jets facing the fluid impingement side so the jet head is configured to deliver a fluid to the plurality of micro-structure tabs through the first and second plurality of micro-jets. The present invention may enable users to input information relating to the behavior in real-time execution of the graphical programs or models.