This function bakees the step function selectors and might be useful
when creating custom steps.
Usage
terms_select(terms, info)
Arguments
terms
A list of formulas whose right-hand side contains quoted
expressions. See quos for examples.
info
A tibble with columns variable, type, role,
and source that represent the current state of the data. The
function summary.recipe can be used to get this information
from a recipe.
Value
A character string of column names or an error of there are no
selectors or if no variables are selected.