399 struct store::results_iterator::impl {  struct in store::results_iterator
401     store::backend _backend;
404     sqlite::statement _stmt;
408         _last_test_program;
411     bool _valid;
414     impl(store::backend& backend_, const int64_t action_id_) :  in impl()  argument
580 struct store::transaction::impl {  struct in store::transaction
582     store::backend& _backend;
586     sqlite::database _db;
589     sqlite::transaction _tx;
594     impl(backend& backend_) :  in impl()  argument