NotImplementedError for sensitivity analysis and sensitivity plot for DoubleMLPLIV

The present code on https://docs.doubleml.org/ for DoubleMLPLIV shows that there is a code for sensitivity_analysis and sensitivity_plot for DoubleMLPLIV. but when i tried running the code i got the error that "NotImplementedError: Sensitivity analysis is not implemented for this model." SO i am not sure if it is a bug or i am mistaken and the sensitivity analysis does not exists for the DoubleMLPLIV model if that is the case would it be possible to generate a code for sensitivity analysis and sensitivity plot for DoubleMLPLIV. thanks