How to "Convert To bezier Path" vía scripting

Hi everyone!

I´m looking for the way to convert a parametric shape (like Rect or Ellipse) into a bezier path.

I have tried it via

app.executeCommand('Convert To Bezier Path');

but since "Convert To Bezier Path" has not comand ID (if I ask with app.indMenuCommandId('Convert To Bezier Path'), returns 0), It doesn´t work.

Also it could be helpful to know the Bezier path of the parametric shape, even this is not converted to bezier path, but I don´t know how to do this either.

I have been looking for a long time, but I have no a clue!!

Could anybody help me?