/** * Get the number of times each variant has been used for each question in a list * in a set of usages. * @param array $questionids of question ids. * @param qubaid_condition $qubaids ids of the usages to consider. * @return array questionid => variant number => num uses. */ public static function load_used_variants(array $questionids, qubaid_condition $qubaids) { $dm = new question_engine_data_mapper(); return $dm->load_used_variants($questionids, $qubaids); }