Removing columns as features

[TylerGrantSmith]

I have a dataset with a number of "id" features . Is the appropriate method to have them get ignored in model training as for example: task$set_col_roles(c("uar_id", "policy_id"), character())

This appears to remove them from the features role, but it seems like it would be better to have some kind of explicit id type role, since the name role can only be a single column.