Checks if the classify term exists in the model terms, handling interaction terms specified in any order (e.g., B:A when model has A:B, or A:C:B when model has A:B:C).
check_classify_in_terms(classify, model_terms)The classify term as it appears in the model (potentially reordered), or throws an error if not found
Name of predictor variable as a string
Character vector of model term labels