class ActiveFedora::Associations::CollectionAssociation

def delete_or_destroy(records, method)
  records = records.flatten
  records.each { |record| raise_on_type_mismatch(record) }
  existing_records = records.select { |r| r.persisted? }
  records.each { |record| callback(:before_remove, record) }
  delete_records(existing_records, method) if existing_records.any?
  records.each do |record|
    target.delete(record)
  end
  records.each { |record| callback(:after_remove, record) }
end