add_predicted_draws do not include data?

[potash]

Is there a way to have add_predicted_draws() and friends not include the predictor data in its output? If not, I would request adding a return_data argument (that defaults to TRUE for backward compatibility). The usecase is that in a variety of situations (many columns in data, many rows in data, many draws in fit) including data will lead to very large returned tibbles that are very memory inefficient (a lot of duplicated data). Thanks for considering.