This function can be used to set the visibility of the given view port. The function takes the view port index (from 0 to 7) and a boolean true if it is visible and false if it is not.
|view_port||The view port to target (0 - 7)|
|visible||Visibility toggle (true is visible and false is invisible)|
The above code will check to see if the view port is visible and if it is not it is set to visible.