is
- Create returns mutable Boundary;
+ Create returns Boundary;
-- Specific Methods pertaining to the class
-- a model space curve referred to by the Index
-- raises exception if Index <= 0 or Index > NbModelSpaceCurves()
- ParameterCurve (me; Index, Num: Integer) returns mutable IGESEntity
+ ParameterCurve (me; Index, Num: Integer) returns IGESEntity
raises OutOfRange;
---Purpose : returns an individual parameter curve
-- raises exception if Index or Num is out of range