Debugging OCC

hi, dear Open Cascade developers,

I am learning OC, and try to understand some lines of code like this:

void COCCViewerDoc::DisplaySketch()

{ if (bIs2d) { // Display 2d Curves

for (int i = Curves2d.Lower(); i <= Curves2d.Upper(); i++)

{ Handle(Geom2d_Curve) L = Curves2d.Value(i);

GetView()->DisplayCurve(L, Aspect_TOL_SOLID, Aspect_WOL_THICK, Quantity_NOC_DARKSLATEBLUE, Standard_False);

}

I put break point to see the value of L, i hope to get for line start point, end point etc...

but in debugger I got: {entity=0x0000019780b752e0 } it is not available? Thank you Piotr