Returns the largest index in the schedule that contains a task that is not a blank row.
int = Scheduler.getMaximumTaskIndex()
This method returns the largest index value in the schedule for any task that is not a blank row. The first task in the schedule has an index value of 0, the task immediately below it has an index value of 1, and so. For example, if the first ten rows in the schedule contain tasks and the tenth row is not a blank row, this method returns the index value of the tenth row.