refer to OCC curve

Author: tomvanmele

src/compas_occ/geometry/curves/nurbs.py

@@ -496,7 +496,7 @@ def is_rational(self) -> bool:
 
     def copy(self) -> 'OCCNurbsCurve':
         """Make an independent copy of the current curve."""
-        return NurbsCurve.from_parameters(
+        return OCCNurbsCurve.from_parameters(
             self.points,
             self.weights,
             self.knots,