el variation.
X[itemsession_freq] with 1 parameters, with constant level variation.
X[itemsession_ovt] with 1 parameters, with constant level variation.
X[session_income] with 1 parameters, with item level variation.
X[itemsession_ivt] with 1 parameters, with item-full level variation.
X[intercept] with 1 parameters, with item level variation.
device=cpu
==================== received dataset ====================
ChoiceDataset(label=[], item_index=[2779], provided_num_items=[], user_index=[2779], session_ind