The SETOUTPUTSLOT function
tells the node (the expression node in which it is running) to exit
on the specified slot. In a process job, if you follow a node by two
other nodes, you specify a slot for each, for example, 0 and 1. If
you run SETOUTPUTSLOT(1), it tells the process job to continue with
the node that is linked at slot 1. If SETOUTPUTSLOT is not called,
it exits on 0 by default.
The function returns
TRUE if it completed successfully. Otherwise, it returns FALSE.