operator [] method
Implementation
@override
VecPoint2f operator [](int idx) => VecPoint2f.fromPointer(ccore.std_VecVecPoint2f_get_p(ptr, idx), false);
@override
VecPoint2f operator [](int idx) => VecPoint2f.fromPointer(ccore.std_VecVecPoint2f_get_p(ptr, idx), false);