operator [] method
Returns a reference
Note: the memory of returned VecPoint2f is owned by this VecVecPoint2f, explicitly call VecPoint2f.clone if the parent VecVecPoint2f may be disposed.
Implementation
@override
VecPoint2f operator [](int idx) =>
VecPoint2f.fromPointer(ccore.std_VecVecPoint2f_get_p(ptr, idx), attach: false);