check_princ
check_princ(collection_name, NULL);
check_princ(initial_primary_name, NULL);
check_princ(unique1_name, princ1);
check_princ(unique2_name, princ2);
check_princ(initial_primary_name, princ3);
check_princ(collection_name, princ3);
check_princ(collection_name, princ1);
check_princ(collection_name, princ2);
check_princ(collection_name, princ3);
check_princ(initial_primary_name, NULL);
check_princ(collection_name, NULL);
check_princ(collection_name, princ1);
check_princ(unique2_name, NULL);
check_princ(collection_name, princ1);
check_princ(unique1_name, NULL);
check_princ(collection_name, NULL);