A bare object is an R object that has no class attributes (see
rlang::is_bare_character()). A threadbare object is an atomic object (i.e.
not a list(), see is.atomic()), with no attributes at all. The function
returns an error if a list is passed.
threadbare(x)A vector with the same core values as x, but with no attributes()
at all, not even names().
A vector, possibly classed, but not a list object, to strip of all attributes.
Other labelled light:
ll_assert_labelled(),
ll_labelled(),
ll_to_character(),
ll_val_labels(),
ll_var_label()