Controls the values of upper bound constraints.
        This flag controls how upper bound values are calculated;
        it specifies when the inner value size() - 1 is used as the
        bound value, as opposed to the more normal size().
        It may have any of the following values:
      
| Value | Description | 
|---|---|
| Never | 
            Upper bounds are always calculated as size().
           | 
            
| Always | 
            Upper bounds are always calculated as size() - 1.
           | 
            
| FollowLBound | 
            An upper bound is calculated as size() - 1
            if the lower bound for that dimension is non-zero.
            An upper bound is calculated as size()
            if the lower bound for that dimension is zero.
           |